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The Flying Colours Maths blog has been running posts twice weekly since 2012, covering maths from the basics to… well, the most advanced stuff I have a clue about.

Here they all are, sorted by date. Some day, other ways to filter them will be possible.

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Nov 4, 2024

Don't Make Me Tap The Sign: $0^0$ is undefined

Oct 28, 2024

Colin's Cow

Oct 21, 2024

Generating functions and probability distributions

Oct 14, 2024

On exams: a rant

Apr 8, 2024

The Shortest Hypotenuse

Mar 25, 2024

Ask Uncle Colin: How do you factorise this?

Mar 18, 2024

Useful logs trick

Mar 11, 2024

Ask Uncle Colin: How do I factorise this?

Feb 26, 2024

Ask Uncle Colin: Lost in Logarithms

Feb 19, 2024

Reasonable rounding

Feb 12, 2024

Ask Uncle Colin: Splitting Two Pizzas

Jan 29, 2024

Ask Uncle Colin: an induction proof

Jan 22, 2024

Sum of factors

Jan 15, 2024

A Bostock And Chandler Stumper

Jan 8, 2024

Completing the square on a quartic

Dec 25, 2023

A variant on a classic

Dec 18, 2023

A dreadful question

Dec 11, 2023

A lovely proof

Nov 27, 2023

Ask Uncle Colin: A Trig Identity Puzzle

Nov 20, 2023

The square root of 1326

Nov 13, 2023

Why does the difference of two squares work?

Oct 30, 2023

Ask Uncle Colin: A Factor of 77

Oct 23, 2023

A problem from the future

Oct 16, 2023

Simultaneous powers

Oct 9, 2023

Random Number Challenge

Oct 2, 2023

Ask Uncle Colin: Integrating sin(x)

Sep 25, 2023

An infinite ODE

Sep 18, 2023

How do you prove that $\pi < \sqrt{10}$?

Sep 11, 2023

Randomer and randomer

Sep 4, 2023

Ask Uncle Colin: An Ugly Sum

Aug 28, 2023

Powers of 2 and logs base 10

Aug 21, 2023

Ask Uncle Colin: 17.5%

Aug 14, 2023

Sums and products

Aug 11, 2023

Ask Uncle Colin: Fitting a Curve

Aug 7, 2023

Ask Uncle Colin: A Trig Question

Jul 31, 2023

Laplace transforms and ODEs

Jul 24, 2023

An obvious thought about factors

Jul 17, 2023

Ask Uncle Colin: Factorising a cubic

Jul 10, 2023

Dice and Squares

Jul 3, 2023

Ten Quick Questions

Jun 26, 2023

Ask Uncle Colin: the Cube Root of 19,683

Jun 19, 2023

Hell-popping coconuts

Jun 12, 2023

Some Proof approaches

Jun 5, 2023

Ask Uncle Colin: An Approximate Exponent

May 29, 2023

Ask Uncle Colin: Problematic Vectors

May 22, 2023

Ask Uncle Colin: The Probability of winning

May 15, 2023

A STEP question failure

May 8, 2023

A surprisingly deep puzzle

May 1, 2023

An awkward sum

Apr 24, 2023

A factorial puzzle

Apr 17, 2023

Ask Uncle Colin: A Radical Identity

Apr 10, 2023

An involved inverse

Apr 3, 2023

How many friends does Sam have?

Mar 27, 2023

A brief investigation into the cubic election "law"

Mar 20, 2023

Taxicab Numbers and the Eisenstein Integers

Mar 13, 2023

Ask Uncle Colin: A Quartic

Mar 6, 2023

Deducing a function

Feb 27, 2023

A Countdown Conundrum

Feb 20, 2023

Reverse Polish Notation

Feb 13, 2023

A problem in powers

Feb 6, 2023

Ask Uncle Colin: A Cubic Curiosity

Jan 30, 2023

A fishy inequality

Jan 23, 2023

On extending the Euclidean Algorithm to Gaussian integers

Jan 16, 2023

An algebraic argument for the discriminant

Jan 9, 2023

A preposterous parking price

Jan 2, 2023

Ask Uncle Colin: Jumping

Dec 26, 2022

How Do You Solve A Problem Like Bulgaria?

Dec 19, 2022

Factorising with Gaussian integers

Dec 12, 2022

Getting things wrong, together

Dec 5, 2022

Dictionary of Mathematical Eponymy: The Wallis Sieve

Nov 28, 2022

Diffy

Nov 21, 2022

Ask Uncle Colin: A Circumcircle

Nov 17, 2022

Two puzzles

Nov 14, 2022

Correcting an oversight

Nov 12, 2022

Ask Uncle Colin: A Little Complexity

Nov 7, 2022

Dictionary of Mathematical Eponymy: Vernier Scales

Oct 31, 2022

Ask Uncle Colin: Evaluate This!

Oct 24, 2022

Socks, revisited

Oct 17, 2022

Ask Uncle Colin: The cross product form of a line

Oct 10, 2022

A puzzle in Turkish

Oct 4, 2022

Dictionary of Mathematical Eponymy: The Ueda Attractor

Sep 26, 2022

Ask Uncle Colin: A Geometric Sequence with a Cosine in it

Sep 19, 2022

All The Ones

Sep 12, 2022

Ask Uncle Colin: Why is nCr always an integer?

Sep 5, 2022

Dictionary of Mathematical Eponymy: Torricelli's Law

Aug 29, 2022

Problem solved!

Aug 22, 2022

Ask Uncle Colin: A Sneaky Simultaneous Equation

Aug 15, 2022

Problem-solving out loud

Aug 8, 2022

Ask Uncle Colin: Far too many cosines

Aug 1, 2022

Dictionary of Mathematical Eponymy: Sang's Logarithmic Method

Jul 27, 2022

Ask Uncle Colin: A Rugby Puzzler

Jul 25, 2022

Alternative irrationality proofs

Jul 18, 2022

Ask Uncle Colin: Three Unknowns

Jul 11, 2022

How to rate a hill

Jul 4, 2022

Dictionary of Mathematical Eponymy: Rice Pentagonal Tilings

Jun 27, 2022

Ask Uncle Colin: What Does This Sum To?

Jun 20, 2022

Putting the fun in functions

Jun 13, 2022

Ask Uncle Colin: A Poor Approximation

Jun 6, 2022

The Dictionary of Mathematical Eponymy: Qvist's Theorem

May 30, 2022

A Problem-Solving Post Mortem

May 23, 2022

Ask Uncle Colin: Can you find an oblique asymptote without polynomial division?

May 16, 2022

A Red Rag To A Bull (The Duckworth-Lewis-Stern Method)

May 9, 2022

Ask Uncle Colin: What's the Bisector of a Tesseract

May 2, 2022

The Dictionary of Mathematical Eponymy: The Lute of Pythagoras

Apr 25, 2022

IRAC and Mathematical Communication

Apr 18, 2022

Ask Uncle Colin: the ff(n) puzzle

Apr 11, 2022

The Legendary Question 6

Apr 4, 2022

Dictionary of Mathematical Eponymy: The Ollerenshaw-Brée Theorem

Mar 28, 2022

Ask Uncle Colin: The RMS Line

Mar 21, 2022

An Argand Diagram Puzzler

Mar 14, 2022

Ask Uncle Colin: How can I tell if my quartic is a square?

Mar 7, 2022

The Dictionary of Mathematical Eponymy: The Nixon Diamond

Feb 28, 2022

Unlabelled triangles

Feb 21, 2022

Ask Uncle Colin: About Partial Fractions

Feb 14, 2022

A Logarithmic Sequence

Feb 7, 2022

Dictionary of Mathematical Eponymy: Mercier tables

Jan 31, 2022

Ask Uncle Colin: A second derivative

Jan 24, 2022

In Praise of Idlework

Jan 17, 2022

Ask Uncle Colin: An Unknown Denominator

Jan 10, 2022

Why is pi pi?

Jan 3, 2022

The Dictionary of Mathematical Eponymy: The Laves Graph

Dec 29, 2021

Ask Uncle Colin: How Do I Remember The Trig Formulas

Dec 27, 2021

Dotty Hexagons

Dec 22, 2021

Ask Uncle Colin: How Do I Improve My Problem-Solving Skills?

Dec 20, 2021

Cutting a cake into sixths or thirds

Dec 15, 2021

Ask Uncle Colin: horrible powers

Dec 13, 2021

A Folded Channel

Dec 8, 2021

Ask Uncle Colin: Too Many Answers

Dec 6, 2021

The Dictionary of Mathematical Eponymy: Kawasaki's Theorem

Dec 1, 2021

Ask Uncle Colin: A Cursed Integral

Nov 29, 2021

An Interesting Integral

Nov 24, 2021

Ask Uncle Colin: Which Way Does Friction Go?

Nov 22, 2021

A Facet of Factoring

Nov 17, 2021

Ask Uncle Colin: A Nonlinear Graph Transformation

Nov 15, 2021

Some Smart STEP Trigonometry

Nov 10, 2021

Ask Uncle Colin: A Dungeon Decision

Nov 8, 2021

A Cubic Conundrum

Nov 3, 2021

Ask Uncle Colin: A Jigsaw Puzzle

Nov 1, 2021

The Dictionary of Mathematical Eponymy: The Jordan Curve Theorem

Oct 27, 2021

Ask Uncle Colin: Why is this pi by 4?

Oct 25, 2021

A Twenty-Five Horse Race

Oct 20, 2021

Ask Uncle Colin: How to factorise this?

Oct 18, 2021

The Shoelace Formula

Oct 13, 2021

Ask Uncle Colin: Factorising a cubic

Oct 11, 2021

Using generating functions to solve recurrence relations

Oct 6, 2021

Ask Uncle Colin: A Circular Tangent

Oct 4, 2021

The Dictionary of Mathematical Eponymy: Itô Calculus

Sep 29, 2021

Ask Uncle Colin: an odd distribution

Sep 27, 2021

A Fermi Estimation Problem: How Many People Have A Maths A-Level?

Sep 22, 2021

Ask Uncle Colin: Why does this have repeated roots?

Sep 20, 2021

An infinite sum

Sep 15, 2021

Ask Uncle Colin: A rotated hyperbola

Sep 13, 2021

Morrie's Law

Sep 8, 2021

Ask Uncle Colin - An Implicit Curve

Sep 6, 2021

Dictionary of Mathematical Eponymy: The Haynsworth Inertia Additivity Formula

Sep 1, 2021

Ask Uncle Colin: Comparing Irrational Exponents

Aug 30, 2021

Reversible numbers

Aug 27, 2021

What's My Plot, Episode 3

Aug 25, 2021

Ask Uncle Colin: A Messy Cosh

Aug 23, 2021

Brathwaite's Law

Aug 18, 2021

Ask Uncle Colin: A Tricksy Triangle

Aug 16, 2021

Solving Pell's equation with continued fractions

Aug 11, 2021

Ask Uncle Colin: An Antisymmetric Relation

Aug 9, 2021

A sock puzzle

Aug 4, 2021

Ask Uncle Colin: A fiddly Area

Aug 2, 2021

Dictionary of Mathematical Eponymy: The Gray Graph

Jul 28, 2021

Ask Uncle Colin: Runs of numbers

Jul 26, 2021

Five reasons your trapezium rule answer might be off

Jul 21, 2021

Ask Uncle Colin: Messy Geometry

Jul 19, 2021

A STEP question that just drops out

Jul 14, 2021

Ask Uncle Colin: An Algebraic Puzzler

Jul 12, 2021

The Angle Windmill

Jul 7, 2021

Ask Uncle Colin: A Tournament

Jul 5, 2021

Dictionary of Mathematical Eponymy: The Fischer 1960 Ellipsoid

Jun 30, 2021

Ask Uncle Colin: A Vector Problem

Jun 28, 2021

A crab and some cups

Jun 23, 2021

Ask Uncle Colin: A Gnarly Integral

Jun 21, 2021

Monty Hall and the Two-Armed Bandit

Jun 16, 2021

Ask Uncle Colin: A Pathological Conic

Jun 14, 2021

An iterative wrinkle

Jun 9, 2021

Ask Uncle Colin: The Constant Term

Jun 7, 2021

The Dictionary of Mathematical Eponymy: The Euler Brick

Jun 4, 2021

What's the plot, episode 2

Jun 2, 2021

Ask Uncle Colin: Simplify *this*!

May 31, 2021

Books for... Real Analysis

May 26, 2021

Ask Uncle Colin: Is this an ellipse?

May 24, 2021

Curvilinear Asymptotes in GeoGebra

May 21, 2021

What's the plot

May 19, 2021

Ask Uncle Colin: Comparing numbers

May 17, 2021

The Last Banana

May 12, 2021

Ask Uncle Colin: The Middle Value

May 10, 2021

A chalkboard challenge

May 5, 2021

Ask Uncle Colin: Couples

May 3, 2021

Dictionary of Mathematical Eponymy: The Dubins Path

Apr 28, 2021

Ask Uncle Colin: Which roots have the greater sum?

Apr 26, 2021

A piece of cake

Apr 21, 2021

Ask Uncle Colin: A Geometric Subset

Apr 19, 2021

A pretty puzzle

Apr 14, 2021

Ask Uncle Colin: A classical mixture

Apr 12, 2021

Circles in Seattle

Apr 7, 2021

Ask Uncle Colin: A Couple of Tangents

Apr 5, 2021

The Dictionary of Mathematical Eponymy: Borromean rings and the Clélie curve

Mar 31, 2021

Ask Uncle Colin: Remembering the Unit Circle

Mar 29, 2021

Why $\Gamma\left(\frac{1}{2}\right) = \sqrt{\pi}$

Mar 24, 2021

Ask Uncle Colin: A restricted determinant

Mar 22, 2021

A Continued Fraction for $e$

Mar 17, 2021

Ask Uncle Colin: Comparing powers

Mar 15, 2021

How should the children cross the road?

Mar 10, 2021

Ask Uncle Colin: The Swiss System and the Champions League

Mar 8, 2021

On division rules

Mar 3, 2021

Ask Uncle Colin: limits with different arguments

Mar 1, 2021

The Dictionary of Mathematical Eponymy: The Witch of Agnesi

Feb 24, 2021

Ask Uncle Colin - A Tangential Proof

Feb 22, 2021

Resistors

Feb 17, 2021

Ask Uncle Colin: A Thirteenth Root

Feb 15, 2021

Reflecting on a MAT question

Feb 10, 2021

Ask Uncle Colin: Adjusting a sketch

Feb 8, 2021

"Given"

Feb 3, 2021

Ask Uncle Colin: The Turning Points of a Cubic

Feb 1, 2021

Dictionary of Mathematical Eponymy: Zhao Youqin's Method

Jan 27, 2021

Ask Uncle Colin: A Four-Rooted Quartic

Jan 25, 2021

A puzzle on a square

Jan 20, 2021

Ask Uncle Colin: A 100th digit of a 500th power

Jan 18, 2021

A Triplets Puzzle

Jan 11, 2021

An Olympiad question

Jan 6, 2021

Ask Uncle Colin: An Inequality Implication

Jan 4, 2021

Dictionary of Mathematical Eponymy: Yamartino's Method

Dec 30, 2020

Ask Uncle Colin: a surprising sum

Dec 28, 2020

Books of the Year 2020

Dec 23, 2020

Ask Uncle Colin: Do You *Have* To Be Such A Smart-Arse?

Dec 21, 2020

A factorial puzzle from NRICH

Dec 16, 2020

Ask Uncle Colin: What shape is this?

Dec 14, 2020

Fahrenheit and Celsius

Dec 9, 2020

Ask Uncle Colin: How did they do this so quickly?

Dec 7, 2020

Dictionary of Mathematical Eponymy: The Xuong Tree

Dec 2, 2020

Ask Uncle Colin: A Bogus Proof

Nov 30, 2020

A random number puzzle

Nov 25, 2020

Ask Uncle Colin: Circles

Nov 23, 2020

A proof without words

Nov 18, 2020

Ask Uncle Colin: Angles and roots

Nov 16, 2020

The Mathematical Ninja and the Cube Root of 81

Nov 11, 2020

Ask Uncle Colin: A Calculator Error

Nov 9, 2020

Continued fractions and the square root of 3.

Nov 4, 2020

Ask Uncle Colin: A Seemingly Undefined Integral

Nov 2, 2020

Dictionary of Mathematical Eponymy: Wahba's Problem

Oct 28, 2020

Ask Uncle Colin: An equation full of powers

Oct 26, 2020

When Maths Gets Difficult

Oct 21, 2020

Ask Uncle Colin: an unexpected Golden Ratio

Oct 19, 2020

A Catriona Shearer Classic

Oct 14, 2020

Ask Uncle Colin: how many zeros?

Oct 12, 2020

Completing the square

Oct 7, 2020

Ask Uncle Colin: A Pair Of Toy Trucks

Oct 5, 2020

Dictionary of Mathematical Eponymy: Volder's algorithm

Sep 30, 2020

Ask Uncle Colin: integrating a trigonometric product

Sep 28, 2020

A Puzzle Full of Nines

Sep 23, 2020

Ask Uncle Colin: How do I stretch my students?

Sep 21, 2020

Primes or not?

Sep 16, 2020

Ask Uncle Colin: Where does the asymptote go?

Sep 14, 2020

The Mathematical Ninja and the Power of Ten

Sep 9, 2020

Ask Uncle Colin: An Integral The Tutor Couldn't Do

Sep 7, 2020

Dictionary of Mathematical Eponymy: The Ulam Spiral

Sep 2, 2020

Ask Uncle Colin: Slicing a Cone

Aug 31, 2020

How many people did they ask?

Aug 26, 2020

Ask Uncle Colin: On the Mediant

Aug 24, 2020

On Continued Fractions

Aug 19, 2020

Ask Uncle Colin: Powers

Aug 17, 2020

Eye to Eye

Aug 12, 2020

Ask Uncle Colin: A Circle In 3D

Aug 10, 2020

A puzzle from BoingBoing

Aug 5, 2020

Ask Uncle Colin: The Area In Between

Aug 3, 2020

Dictionary of Mathematical Eponymy: Trémaux's Algorithm

Jul 29, 2020

Ask Uncle Colin: A Sum With An Unknown

Jul 27, 2020

The Mathematical Ninja and Logs Base 2

Jul 22, 2020

Ask Uncle Colin: Factorising

Jul 20, 2020

Summing with Generating Functions

Jul 15, 2020

Ask Uncle Colin: Why does the $ac$ method work?

Jul 13, 2020

Captain Holt's Seesaw

Jul 8, 2020

Ask Uncle Colin: Dividing Decimals

Jul 6, 2020

Dictionary of Mathematical Eponymy: The Sieve of Sundaram

Jul 1, 2020

Ask Uncle Colin: The Area Between Two Curves

Jun 29, 2020

On Common Factors and Multiples

Jun 26, 2020

Wrong, but Useful: Episode 80/80

Jun 24, 2020

Ask Uncle Colin: A Fraction of a Square

Jun 22, 2020

A Sudoku Surprise

Jun 17, 2020

Ask Uncle Colin: An Octahedral Angle

Jun 15, 2020

Resolving an Unfinished League

Jun 10, 2020

There is no Ask Uncle Colin today #strike4blacklives

Jun 8, 2020

Cav, Catriona and some hexagons

Jun 3, 2020

Ask Uncle Colin: Two Numbers Close To 1

Jun 1, 2020

The Dictionary of Mathematical Eponymy: Randolph diagrams

May 27, 2020

Ask Uncle Colin: A difference of polynomials

May 25, 2020

A puzzle from Sheena

May 20, 2020

Ask Uncle Colin: Flipping Signs

May 18, 2020

Bending a long bar

May 13, 2020

Ask Uncle Colin: A Fractional Equation

May 11, 2020

Binet’s formula and Haskell

May 6, 2020

Ask Uncle Colin: The Empty Product

May 4, 2020

Dictionary of Mathematical Eponymy: The Quine-McCluskey Algorithm

Apr 29, 2020

Ask Uncle Colin: Rotating vectors

Apr 27, 2020

Some puzzles from Cav

Apr 22, 2020

Ask Uncle Colin: Two trig identities

Apr 20, 2020

Powers and remainders

Apr 17, 2020

Wrong, But Useful: Episode 78

Apr 15, 2020

Ask Uncle Colin: An Additive Inverse

Apr 13, 2020

Vectors, lines and laziness

Apr 8, 2020

Ask Uncle Colin: Incircles

Apr 6, 2020

Dictionary of Mathematical Eponymy: Mrs Perkins' Quilt

Apr 1, 2020

Ask Uncle Colin: Remainders

Mar 30, 2020

A "creative" integral

Mar 25, 2020

Ask Uncle Colin: An Arcsine Inversion

Mar 23, 2020

Fibonacci parity

Mar 18, 2020

Ask Uncle Colin: A Horrible-looking Limit

Mar 17, 2020

Emergency Ask Uncle Colin: What happens now?

Mar 16, 2020

The Mathematical Ninja and an Irrational Power

Mar 13, 2020

Wrong, But Useful: Episode 77

Mar 11, 2020

Ask Uncle Colin: Long Division in Base 5

Mar 9, 2020

A PSA on Cylinders and Prisms

Mar 6, 2020

Wrong, but Useful: Episode 76b

Mar 4, 2020

Ask Uncle Colin: A Pointy Thing

Mar 2, 2020

Dictionary of Mathematical Eponymy: Osborn's Law

Feb 28, 2020

Wrong, But Useful: Episode 76

Feb 26, 2020

Ask Uncle Colin: A Trigonometric Identity

Feb 24, 2020

A Tenth Of A Pizza

Feb 19, 2020

Ask Uncle Colin: The Twelve Coin Puzzle

Feb 17, 2020

A GCSE surprise

Feb 12, 2020

Ask Uncle Colin: A Pair of Vectors

Feb 10, 2020

Proofs

Feb 5, 2020

Ask Uncle Colin: A horrible CDF

Feb 3, 2020

Dictionary of Mathematical Eponymy: Noether's Theorem

Jan 29, 2020

Ask Uncle Colin: Dividing by halves

Jan 27, 2020

On inverse-trig integration

Jan 22, 2020

Ask Uncle Colin: A Strange Error

Jan 20, 2020

"How many days old are you?"

Jan 17, 2020

Wrong, but Useful: Episode 75

Jan 15, 2020

A "Components" Enigma

Jan 13, 2020

A few logarithmic tricks

Jan 8, 2020

Ask Uncle Colin: Matching sines

Jan 6, 2020

The Dictionary of Mathematical Eponymy: The MacWilliams Identity

Jan 1, 2020

Ask Uncle Colin: Laying Bricks

Dec 30, 2019

The Mathematical Ninja and the Cube Root of 13

Dec 25, 2019

Ask Uncle Colin: Where Should I Send Charitable Contributions?

Dec 23, 2019

The Classwiz and the Normal Distribution

Dec 18, 2019

Ask Uncle Colin: Some Messy Powers

Dec 16, 2019

Barney's triangles

Dec 11, 2019

Ask Uncle Colin: A Trig Inequality

Dec 9, 2019

A Trigonometric Puzzle

Dec 6, 2019

Wrong, But Useful, Episode 74

Dec 4, 2019

Ask Uncle Colin: A proof

Dec 2, 2019

Dictionary of Mathematical Eponymy: The Lutz-Nagell Theorem

Nov 27, 2019

Ask Uncle Colin: Greatest Common Divisor (with Polynomials)

Nov 25, 2019

A Triangle In A Square

Nov 20, 2019

Ask Uncle Colin... About Partial Fractions

Nov 18, 2019

Constructing the square root of 6

Nov 13, 2019

Ask Uncle Colin: An Exponential Limit

Nov 11, 2019

A Harmonic Conundrum

Nov 8, 2019

Wrong, But Useful, Episode 73

Nov 6, 2019

Ask Uncle Colin: How many draws?

Nov 4, 2019

Dictionary of Mathematical Eponymy: The Kovalevskaya Top

Oct 30, 2019

Ask Uncle Colin: Missing Planes

Oct 28, 2019

Summing Products

Oct 25, 2019

Wrong, But Useful: Episode 72

Oct 23, 2019

Ask Uncle Colin: A Curve

Oct 21, 2019

Hotplates

Oct 16, 2019

Ask Uncle Colin: A Partition Enigma

Oct 14, 2019

The Mathematical Ninja and the *Other* Pole

Oct 9, 2019

Ask Uncle Colin: Family

Oct 7, 2019

Dictionary of Mathematical Eponymy: Johnson Solids

Oct 2, 2019

Ask Uncle Colin: The Timeless SUVAT Equation

Sep 30, 2019

Revisiting Minesweeper

Sep 25, 2019

Ask Uncle Colin: A Parametric Integration

Sep 23, 2019

Calculating $e^e$ and $e^{-\frac{1}{e}}$

Sep 20, 2019

Wrong, But Useful: Episode 71

Sep 18, 2019

Ask Uncle Colin: Multiple solutions

Sep 16, 2019

A double tangent

Sep 11, 2019

Ask Uncle Colin: A Pair Of Birds

Sep 9, 2019

Nonupling

Sep 4, 2019

Ask Uncle Colin: Meeting Graphs

Sep 2, 2019

Dictionary of Mathematical Eponymy: Ivory's Theorem

Aug 28, 2019

Ask Uncle Colin: An Area To Find

Aug 26, 2019

The Mathematical Ninja and the Unknown Powers

Aug 21, 2019

Ask Uncle Colin: A Missing Digit

Aug 19, 2019

Barney's Wedge

Aug 14, 2019

Ask Uncle Colin: An Infinite Product

Aug 12, 2019

Regions of a circle

Aug 9, 2019

Wrong, But Useful: Episode 70

Aug 7, 2019

Ask Uncle Colin: Why is $e$ not 1?

Aug 5, 2019

Dictionary of Mathematical Eponymy: Hoberman Sphere

Jul 31, 2019

Ask Uncle Colin: Curved Surface Areas

Jul 29, 2019

Futility Closet, Fibonacci and Quadratic Residues

Jul 24, 2019

Ask Uncle Colin: A problem of squares and powers

Jul 22, 2019

A logs puzzle

Jul 19, 2019

Wrong, But Useful: Episode 69

Jul 17, 2019

Ask Uncle Colin: A Binary Fraction

Jul 15, 2019

A folding puzzle

Jul 10, 2019

Ask Uncle Colin: Round-Robin Progress

Jul 8, 2019

Middle children

Jul 4, 2019

Big Internet Math-Off: My first pitch is live!

Jul 3, 2019

Ask Uncle Colin: Some Symmetric Algebra

Jul 1, 2019

The Dictionary of Mathematical Eponymy: Sophie Germain primes

Jun 26, 2019

Ask Uncle Colin: A Cosine Proof

Jun 24, 2019

The Fundamental Theorem of Countdown

Jun 19, 2019

Ask Uncle Colin: A Modest Inheritance

Jun 17, 2019

A Challenge to the Mathematical Ninja

Jun 14, 2019

Wrong, But Useful: Episode 68

Jun 12, 2019

Ask Uncle Colin: Consecutiveness

Jun 10, 2019

Google's Keypad

Jun 5, 2019

Ask Uncle Colin: A Trigonometric Puzzle

Jun 3, 2019

The Dictionary of Mathematical Eponymy: The Fermat Cubic

May 29, 2019

Ask Uncle Colin: Powers and squares

May 27, 2019

A strange number base

May 22, 2019

Ask Uncle Colin: The Probability of Winning

May 20, 2019

Cards and lattices

May 17, 2019

Wrong, But Useful: Episode 67

May 15, 2019

Ask Uncle Colin: a fractional power

May 13, 2019

A triangle puzzle

May 8, 2019

Ask Uncle Colin: an irrational power

May 6, 2019

Dictionary of Mathematical Eponymy: Elo ratings

May 1, 2019

Ask Uncle Colin: Family

Apr 29, 2019

On Estimating

Apr 24, 2019

Ask Uncle Colin: The Polar Express(ion)

Apr 23, 2019

Wrong, But Useful: Episode 66

Apr 22, 2019

The Mathematical Ninja and $\arctan(0.4)$

Apr 17, 2019

Ask Uncle Colin: A Six-Digit Square

Apr 15, 2019

Tactical Voting

Apr 10, 2019

Ask Uncle Colin: A round-robin

Apr 8, 2019

Heads, Tails and Bumpsdaisy, revisited

Apr 3, 2019

Ask Uncle Colin: Disguised quadratics

Apr 1, 2019

The Dictionary of Mathematical Eponymy: Daubechies Wavelets

Mar 27, 2019

Ask Uncle Colin: Traffic Flow

Mar 25, 2019

The Mathematical Ninja and the Ninety-Sevenths

Mar 22, 2019

Wrong, But Useful: Episode 65

Mar 20, 2019

Ask Uncle Colin: A Fishy Derivative

Mar 18, 2019

Powers

Mar 13, 2019

Ask Uncle Colin: Are these fractions equivalent?

Mar 11, 2019

A Puzzle From The MathsJam Shout (With Generating Functions)

Mar 6, 2019

Ask Uncle Colin: Solving Trigonometric Equations

Mar 4, 2019

Dictionary of Mathematical Eponymy: The Collatz Conjecture

Feb 27, 2019

Ask Uncle Colin: Scheduling a tournament

Feb 25, 2019

The Mathematical Ninja and the Other Rope

Feb 20, 2019

Ask Uncle Colin: What's $\sqrt{100!}$?

Feb 18, 2019

A Textbook Error?

Feb 13, 2019

Ask Uncle Colin: It's Hip To Be Square

Feb 12, 2019

Wrong, But Useful: Episode 64

Feb 11, 2019

On Epiphanies

Feb 6, 2019

Ask Uncle Colin: Computing $\sqrt{2}$

Feb 4, 2019

The Dictionary of Mathematical Eponymy: Banach's Matchbox Problem

Jan 30, 2019

Ask Uncle Colin: An Implicit problem

Jan 28, 2019

A Matrix Definition of a Line

Jan 23, 2019

Ask Uncle Colin: Powers and Remainders

Jan 21, 2019

Factfulness

Jan 16, 2019

Ask Uncle Colin: A dangling rope

Jan 15, 2019

Wrong, But Useful: Episode 63

Jan 14, 2019

What I learnt from a STEP Speedrun

Jan 9, 2019

Ask Uncle Colin: Integrating $\sec$ and $\cosec$

Jan 7, 2019

The Dictionary of Mathematical Eponymy: Ackermann's function

Jan 2, 2019

Ask Uncle Colin: A Strange Simultaneous Equation

Dec 31, 2018

Sticks and Stones

Dec 26, 2018

Ask Uncle Colin: A Factorial Sum

Dec 24, 2018

A Christmas Decagon

Dec 19, 2018

Ask Uncle Colin: Some Ugly Trigonometry

Dec 17, 2018

Review: Festival of the Spoken Nerd, You Can't Polish A Nerd

Dec 12, 2018

Ask Uncle Colin: A factorising trick

Dec 11, 2018

Wrong, But Useful: Episode 62

Dec 10, 2018

Bone Marrow Odds

Dec 5, 2018

Ask Uncle Colin: A Mess of Logs

Dec 3, 2018

Exchange rates on board

Nov 28, 2018

Maths, Magnus Carlsen, and Making Decisions

Nov 28, 2018

Ask Uncle Colin: A Cubic That Won't Come Good

Nov 27, 2018

All The Maths Podcasts

Nov 26, 2018

The Mathematical Ninja and the Variable Volume

Nov 21, 2018

Ask Uncle Colin: How do I keep my head up?

Nov 19, 2018

Heads, Tails and bumps-a-daisy

Nov 14, 2018

Ask Uncle Colin: Why is it called "completing the square"?

Nov 12, 2018

ILATE vs LIATE

Nov 7, 2018

Ask Uncle Colin: a load of balls

Nov 5, 2018

On degrees

Oct 31, 2018

Ask Uncle Colin: A Set Square Mark

Oct 29, 2018

A tasty puzzle

Oct 24, 2018

Ask Uncle Colin: Platonic Solids

Oct 23, 2018

Wrong, But Useful: Episode 61

Oct 22, 2018

Mathematical Dingbats

Oct 17, 2018

Ask Uncle Colin: Some number theory

Oct 15, 2018

A moment of neatness

Oct 10, 2018

Ask Uncle Colin: Powers

Oct 8, 2018

Ten great books to give an interested mathematician

Oct 3, 2018

Ask Uncle Colin: Some Rigour Required

Oct 1, 2018

The Mathematical Ninja and the Cube Root of 4

Sep 26, 2018

Ask Uncle Colin: A Ridiculous Restriction

Sep 24, 2018

Factorising a large number, part II: Gaussian integers

Sep 19, 2018

Ask Uncle Colin: a nasty integral

Sep 18, 2018

Wrong, But Useful: Episode 60

Sep 17, 2018

Factorising a large number, part I: Sums of squares in different ways

Sep 12, 2018

Ask Uncle Colin: A Differential Equation

Sep 10, 2018

Review: Hello World, by Hannah Fry

Sep 5, 2018

Ask Uncle Colin: Decimal arithmetic

Sep 3, 2018

The Mathematical Ninja And The Driving Awareness Course

Aug 29, 2018

Ask Uncle Colin: A Log Approximation

Aug 27, 2018

On Customer Survey Forms

Aug 22, 2018

Ask Uncle Colin: Two triangles

Aug 21, 2018

Wrong, But Useful: Episode 59

Aug 20, 2018

The Maths Behind The Errors In The Maths Behind

Aug 15, 2018

Ask Uncle Colin: A Trigonometric Proof

Aug 13, 2018

Complex transformations (and incorrect wording?)

Aug 8, 2018

Ask Uncle Colin: A Tangential Conundrum

Aug 6, 2018

Doubling

Aug 1, 2018

Ask Uncle Colin: About A Tetrahedron

Jul 30, 2018

A probability puzzle

Jul 25, 2018

Ask Uncle Colin: Stuck on some trig

Jul 23, 2018

Can you find a centre and angle of rotation without any construction?

Jul 18, 2018

Ask Uncle Colin: inverses and all sorts

Jul 17, 2018

Wrong, But Useful: Episode 58

Jul 16, 2018

Why the factor and remainder theorem work

Jul 11, 2018

Ask Uncle Colin: Quadratic sequences

Jul 9, 2018

Two coins, one fair, one biased

Jul 4, 2018

Ask Uncle Colin: A Coin Toss Conundrum

Jul 2, 2018

A calculator puzzle

Jun 27, 2018

Ask Uncle Colin: An Unclear Inequality

Jun 25, 2018

A Varignon Vector Masterclass

Jun 20, 2018

Ask Uncle Colin: Argentina vs Nigeria

Jun 18, 2018

$\cos(72º)$, revisited again: De Moivre's Theorem

Jun 13, 2018

Ask Uncle Colin: A Polling Percentage

Jun 12, 2018

Wrong, But Useful: Episode 57

Jun 11, 2018

$\cos(72º)$, revisited: a geometric method

Jun 6, 2018

Ask Uncle Colin: Something powerful

Jun 4, 2018

Square wheels on a round(ish) floor

May 30, 2018

Ask Uncle Colin: Sketching in 3D

May 28, 2018

Back in 1940...

May 23, 2018

Ask Uncle Colin: Grade boundaries

May 21, 2018

A Handshake Problem From the MathsJam Shout

May 16, 2018

Ask Uncle Colin: A Complex Roots Problem

May 15, 2018

Wrong, But Useful: Episode 56

May 14, 2018

Review: Genius at Play, by Siobhan Roberts

May 9, 2018

Ask Uncle Colin: A binomial puzzler

May 7, 2018

The Mathematical Ninja and the SSNs

May 2, 2018

Ask Uncle Colin: Auxiliary Equations With Repeated Roots

Apr 30, 2018

Eigenvalues

Apr 25, 2018

Ask Uncle Colin: A Fractional Kerfuffle

Apr 24, 2018

Wrong, But Useful: Episode 55

Apr 23, 2018

The Involution of Polynomials

Apr 18, 2018

Ask Uncle Colin: Tangents to a circle

Apr 16, 2018

The Evolution of Polynomials

Apr 11, 2018

Ask Uncle Colin: A Troublesome Triangle

Apr 9, 2018

Using Units to Deal With Density

Apr 4, 2018

Ask Uncle Colin: A modulus power

Apr 2, 2018

Sprinkle on the sugar, eat the lot

Mar 28, 2018

Ask Uncle Colin: A Misbehaving Inverse

Mar 26, 2018

The Stuckness of Andrew Wiles

Mar 21, 2018

Ask Uncle Colin: A Fractional Limit

Mar 19, 2018

Cowboy Completing The Square

Mar 14, 2018

Ask Uncle Colin: A multi-cubic integral

Mar 13, 2018

Wrong, But Useful: Episode 54

Mar 12, 2018

Another @solvemymaths problem

Mar 7, 2018

Ask Uncle Colin: A Weird Arithmetic Progression

Mar 5, 2018

A RITANGLE problem

Feb 28, 2018

Ask Uncle Colin: Complex quadratics with real values

Feb 26, 2018

The Problem Of The Nine-Coloured Cube

Feb 21, 2018

Ask Uncle Colin: Dimensions of a box

Feb 19, 2018

Random number tables

Feb 14, 2018

Ask Uncle Colin: Completing the Square

Feb 13, 2018

Wrong, But Useful: Episode 53

Feb 12, 2018

Daylight, Durlston Castle, and Where is Hamburg?

Feb 7, 2018

Ask Uncle Colin: What is $\cos(72º)$?

Feb 5, 2018

An "Impossible" New Zealand exam: Part II

Jan 31, 2018

Ask Uncle Colin: A Plane-teaser

Jan 29, 2018

An "Impossible" New Zealand exam: Part I

Jan 24, 2018

Ask Uncle Colin: Horizontal Asymptotes

Jan 22, 2018

The Mathematical Ninja and $\sin(15º)$

Jan 17, 2018

Ask Uncle Colin: A mental quotient

Jan 16, 2018

Wrong, But Useful: Episode 52

Jan 15, 2018

On $0 \div 0$

Jan 10, 2018

Ask Uncle Colin: A surprising order

Jan 8, 2018

The Maths Behind... Cakes

Jan 3, 2018

Ask Uncle Colin: Solve this!

Jan 1, 2018

A New Year's Resolution: Diversity

Dec 27, 2017

Ask Uncle Colin: How can I be neater?

Dec 25, 2017

Glittering like a Christmas tree

Dec 20, 2017

Ask Uncle Colin: A Gambling Fallacy

Dec 18, 2017

In Praise of... LaTeX

Dec 13, 2017

Ask Uncle Colin: A peculiar triangle

Dec 12, 2017

Wrong, But Useful: Episode 51, featuring @suedepom

Dec 11, 2017

The Sneakiest Integral I've Ever Done

Dec 6, 2017

Ask Uncle Colin: Expected goals

Dec 4, 2017

An unexpected connection

Nov 29, 2017

Ask Uncle Colin: Winning the Lottery

Nov 27, 2017

A quadratic simultaneous equation

Nov 22, 2017

Ask Uncle Colin: Evil in integral form

Nov 20, 2017

Long division

Nov 15, 2017

Ask Uncle Colin: I keep forgetting stuff!

Nov 14, 2017

Wrong, But Useful: Episode 50

Nov 13, 2017

Another of Colin's blasted puzzles

Nov 8, 2017

Ask Uncle Colin: Oh God, Not This Again

Nov 6, 2017

On the obelus

Nov 1, 2017

Ask Uncle Colin: Impulse and Speed

Oct 30, 2017

"Two-timing"

Oct 25, 2017

Ask Uncle Colin: A Radical Feast

Oct 24, 2017

Wrong, But Useful: Episode 49

Oct 23, 2017

Several Strings of 1s

Oct 18, 2017

Ask Uncle Colin: A Cosec Proof

Oct 16, 2017

Tessellations and cuboids

Oct 11, 2017

Ask Uncle Colin: Simultaneous Trigonometry

Oct 9, 2017

Are you sure that's a right angle?

Oct 4, 2017

Ask Uncle Colin: Shouldn't this be simple?

Oct 2, 2017

Lines and squares

Sep 27, 2017

Ask Uncle Colin: touching cubics

Sep 25, 2017

Revisiting Basel

Sep 20, 2017

Ask Uncle Colin: An Infinite Sum

Sep 18, 2017

The Paradox of the Second Ace

Sep 13, 2017

Ask Uncle Colin: An oblique asymptote

Sep 11, 2017

Mishandling polynomials for fun and profit

Sep 6, 2017

Ask Uncle Colin: Messing about with infinity

Sep 4, 2017

The Mathematical Ninja takes a square root

Aug 30, 2017

Ask Uncle Colin: Reversing Fibonacci

Aug 28, 2017

An Australian Dining Phenomenon

Aug 23, 2017

Ask Uncle Colin: An Uncommon Logarithm

Aug 22, 2017

Wrong, But Useful: Episode 47

Aug 21, 2017

Collecting coupons

Aug 16, 2017

Ask Uncle Colin: An Absurd Quadratic

Aug 14, 2017

An Integral Diversion

Aug 9, 2017

Ask Uncle Colin: Spotting factors

Aug 7, 2017

Revisiting some missing solutions

Aug 2, 2017

Ask Uncle Colin: An Enormous Sum

Jul 31, 2017

My Stab At Colin's Puzzle

Jul 26, 2017

Ask Uncle Colin: An Absolute Quadratic Inequality

Jul 24, 2017

The Return Of The Cav

Jul 19, 2017

Ask Uncle Colin: Some missing solutions

Jul 18, 2017

Wrong, But Useful: Episode 46

Jul 17, 2017

A coin sequence conundrum

Jul 12, 2017

Ask Uncle Colin: A Polar Expression

Jul 10, 2017

The Mathematical Ninja and Cosines

Jul 5, 2017

Ask Uncle Colin: Factors!

Jul 3, 2017

A common problem: not reading carefully

Jun 28, 2017

Ask Uncle Colin: Trouble in Sector ABC

Jun 26, 2017

Attack of the Mathematical Zombies: Calc vs non-calc

Jun 21, 2017

Ask Uncle Colin: A STEP in the right direction

Jun 19, 2017

A curve-sketching masterclass

Jun 14, 2017

Ask Uncle Colin: fourth roots

Jun 13, 2017

Wrong, But Useful: Episode 45

Jun 12, 2017

Some Thoughts On EdExcel 9-1 GCSE Paper 1

Jun 7, 2017

Ask Uncle Colin: about Chebyshev's Equation

Jun 5, 2017

A Summary Of Some Summery Summation

Jun 5, 2017

Sum summary: update

May 31, 2017

Ask Uncle Colin: Powers and polar form

May 29, 2017

How Would Martin Gardner Prove It?

May 24, 2017

Ask Uncle Colin: A Complex Conundrum

May 22, 2017

Mr Penberthy's Problem

May 17, 2017

Ask Uncle Colin: My partial fractions decompose funny

May 16, 2017

Wrong, But Useful: Episode 44

May 15, 2017

Review: The Mathematics Lover's Companion, by Edward Scheinerman

May 10, 2017

Ask Uncle Colin: an arctangent mystery

May 8, 2017

When heuristics go bad

May 3, 2017

Ask Uncle Colin: A load of parabolics

May 1, 2017

Spherical caps and coordinate systems

Apr 26, 2017

Ask Uncle Colin: how big do the patches on a football need to be?

Apr 24, 2017

The Mathematical Ninja and the Poisson Distribution

Apr 19, 2017

Ask Uncle Colin: Parametric Second Derivatives

Apr 17, 2017

Sweet and Sour Limits

Apr 12, 2017

Ask Uncle Colin: A Short, Sweet Limit

Apr 11, 2017

Wrong, But Useful: Episode 43

Apr 10, 2017

The Mathematical Pirate and The Quotient Rule

Apr 5, 2017

Ask Uncle Colin: Approximating an embedded exponential

Apr 3, 2017

The Mathematical Ninja lets the student investigate... cube roots

Apr 1, 2017

Announcing: Ninja\|Alpha

Mar 29, 2017

Ask Uncle Colin: Why does the constant term vanish?

Mar 27, 2017

How the Mathematical Ninja approximates $\ln(5)$

Mar 22, 2017

Ask Uncle Colin: A Separable Difficulty

Mar 20, 2017

A common problem: decimal division

Mar 15, 2017

Ask Uncle Colin: 10,958

Mar 14, 2017

Wrong, But Useful: Episode 42

Mar 13, 2017

A Digital Root Puzzle

Mar 8, 2017

Ask Uncle Colin: another vile limit

Mar 6, 2017

Another of Alison's Ace Puzzles, Revisited

Mar 1, 2017

Ask Uncle Colin: Are normals... normal?

Feb 27, 2017

From Euclid to Cantor

Feb 22, 2017

Ask Uncle Colin: Trigonometric inverses and picking the correct quadrant

Feb 20, 2017

A surprising overlap

Feb 15, 2017

Ask Uncle Colin: Perpendicular vectors

Feb 14, 2017

Wrong, But Useful: Episode 41

Feb 13, 2017

Another of Alison's Ace Puzzles

Feb 8, 2017

Ask Uncle Colin: Bridges, Donkeys and Triangles

Feb 6, 2017

Going around incircles

Feb 1, 2017

Ask Uncle Colin: A Triangle That's Not As Nice As It Looks

Jan 30, 2017

How the Mathematical Ninja approximates $\sin(55º)$

Jan 25, 2017

Ask Uncle Colin: A Stupid Expansion

Jan 23, 2017

An innovative algebraic approach

Jan 18, 2017

Ask Uncle Colin: How do I find the power?

Jan 17, 2017

Wrong, But Useful: Episode 40

Jan 16, 2017

An ex-straw-dinarily silly Fermi problem

Jan 11, 2017

Ask Uncle Colin: How do I add things up?

Jan 9, 2017

On a Crossnumber Clue

Jan 4, 2017

Ask Uncle Colin; A variable fraction

Jan 2, 2017

A New Year's Resolution For You (Only For Genius [sic])

Dec 28, 2016

Ask Uncle Colin: Find me a circle!

Dec 26, 2016

Some charitable suggestions

Dec 21, 2016

Ask Uncle Colin: Why is it not 4?

Dec 19, 2016

Some exam technique tips for the new GCSE

Dec 14, 2016

Ask Uncle Colin: How do I multiply big numbers together?

Dec 13, 2016

Wrong, But Useful: Episode 39

Dec 13, 2016

Quickfire reviews

Dec 12, 2016

This is what you trained for!

Dec 7, 2016

Ask Uncle Colin: A Quadratic Conjecture

Dec 5, 2016

A nice bit of nrichment

Nov 30, 2016

Ask Uncle Colin: A Rational Mess

Nov 28, 2016

How The Mathematical Pirate Integrates By Parts

Nov 23, 2016

Ask Uncle Colin: Should I Interrupt?

Nov 21, 2016

Wrong, But Useful: Episode 38

Nov 16, 2016

Ask Uncle Colin: Dividing by decimals

Nov 14, 2016

On quadratic sequences

Nov 9, 2016

Ask Uncle Colin: is there a link?

Nov 7, 2016

How do you estimate the normal distribution for large $z$?

Nov 2, 2016

Ask Uncle Colin: Why don't you use 'Dr' on your books?

Oct 31, 2016

On the trick with 9s

Oct 26, 2016

Ask Uncle Colin: how to do moments questions?

Oct 24, 2016

The Great Straight Lines debate

Oct 19, 2016

Ask Uncle Colin: Am I working too hard?

Oct 17, 2016

The Mathematical Ninja And The Cubes

Oct 12, 2016

Ask Uncle Colin: A Huge Power Of Two

Oct 10, 2016

Wrong, But Useful: Episode 37

Oct 5, 2016

Ask Uncle Colin: Invariant Lines

Oct 3, 2016

A curve-sketching challenge

Sep 28, 2016

Ask Uncle Colin: A Vector Line

Sep 26, 2016

Getting closer to $\pi$

Sep 21, 2016

Ask Uncle Colin: A Stretch, Indeed

Sep 19, 2016

The Echo and a simple answer

Sep 14, 2016

Ask Uncle Colin: A Three-Variable Simultaneous Equation

Sep 12, 2016

Some interesting confusion

Sep 7, 2016

Ask Uncle Colin: Finding a curve with an asymptote

Sep 5, 2016

Should you need a maths degree to teach maths?

Aug 31, 2016

Ask Uncle Colin: How do I prove I've revised?

Aug 29, 2016

Fractions that generate Pythagorean Triples

Aug 24, 2016

Ask Uncle Colin: An elastic speed limit

Aug 22, 2016

The Mathematical Ninja and the Tangents Near 1

Aug 17, 2016

Ask Uncle Colin: Radians Celsius

Aug 15, 2016

On recurring decimals

Aug 10, 2016

Ask Uncle Colin: Rational Trigonometric Values

Aug 8, 2016

An alternative proof of the $\sin(2x)$ identity

Aug 3, 2016

Ask Uncle Colin: why does the normal distribution stop at $z=\pm 4$?

Aug 1, 2016

Repdigit endings to squares

Jul 29, 2016

Wrong, But Useful: Episode 36

Jul 27, 2016

Ask Uncle Colin: How do I multiply mixed fractions?

Jul 25, 2016

The Mathematical Ninja and the Nineteenths

Jul 20, 2016

Ask Uncle Colin: A STEP vectors problem

Jul 18, 2016

Why $\phi^n$ is nearly an integer

Jul 13, 2016

Ask Uncle Colin: What is $\tan(1º)$?

Jul 11, 2016

The Maths Police Investigate: For The Love Of God, Make It Stop

Jul 6, 2016

Ask Uncle Colin: Can you prove $\sin(2x) \equiv 2\sin(x)\cos(x)$?

Jul 4, 2016

Brutal simultaneous equations

Jun 29, 2016

Ask Uncle Colin: Why does the line with equation $10y+36x=16.5$ have a gradient of -3.6?

Jun 27, 2016

A surd simplification masterclass

Jun 22, 2016

Ask Uncle Colin: How did they get $\ln(50)$?

Jun 20, 2016

The Bigger Fraction

Jun 15, 2016

Ask Uncle Colin: An absolute quadratic inequality

Jun 13, 2016

On the square root of a third

Jun 8, 2016

Ask Uncle Colin: Am I Smart Enough?

Jun 6, 2016

The Mathematical Ninja and the twenty-sixths

Jun 3, 2016

Wrong, But Useful: Episode 35

Jun 1, 2016

Ask Uncle Colin: Simultaneous Equations

May 30, 2016

A curious identity

May 25, 2016

Ask Uncle Colin: Trigonometric craziness

May 23, 2016

How to invert a $3 \times 3$ matrix

May 18, 2016

Ask Uncle Colin: I've lost my mojo

May 16, 2016

Review: The QAMA Calculator

May 11, 2016

Ask Uncle Colin: An Undefined Integral

May 9, 2016

A lovely trigonometric identity

May 4, 2016

Ask Uncle Colin: Don't be daunted by D'Hondt?

May 2, 2016

A frankly ludicrous bit of paper arithmetic

Apr 27, 2016

Ask Uncle Colin: A quadratic inequality

Apr 25, 2016

A STEP expansion

Apr 20, 2016

Ask Uncle Colin: Two Answers For One Triangle

Apr 18, 2016

Attack of the Mathematical Zombies: $1=2$

Apr 13, 2016

Ask Uncle Colin: A Complex Battle

Apr 11, 2016

A MathsJam Masterclass: A Circle That Won't Behave

Apr 6, 2016

Ask Uncle Colin: A trigonometric integral

Apr 4, 2016

The Mathematical Ninja and The Slinky Coincidence

Apr 1, 2016

Wrong, But Useful: Episode 34

Mar 30, 2016

Ask Uncle Colin: Integration rules

Mar 28, 2016

Further Decimal Curiosities

Mar 23, 2016

Ask Uncle Colin: rearranging $\cos^3(x)$

Mar 21, 2016

Review: Is This Prime?

Mar 16, 2016

Ask Uncle Colin: A STEP integral

Mar 14, 2016

The Mathematical Ninja finds the value of $\pi$

Mar 9, 2016

Ask Uncle Colin: Changing the variable (FP2 Differential equations)

Mar 7, 2016

Second derivatives, reciprocals, and the chain rule

Mar 4, 2016

Wrong, But Useful: Episode 33

Mar 2, 2016

Ask Uncle Colin: Why does the finger trick work?

Feb 29, 2016

Maths and mental health: dealing with panic

Feb 24, 2016

Ask Uncle Colin: How do we know the digits of $\pi$ don't recur?

Feb 22, 2016

The Mathematical Ninja and the First Rule of $\phi$ club

Feb 17, 2016

Ask Uncle Colin: a light matrix product

Feb 15, 2016

The Maths Police Investigate: The Beans Of Wrath

Feb 10, 2016

Ask Uncle Colin: An Absolute Mess

Feb 8, 2016

Review: Turing's Cathedral, by George Dyson

Feb 3, 2016

Ask Uncle Colin: A pentagonal rhombus

Feb 1, 2016

Why I can't get excited about the new largest known prime

Jan 27, 2016

Ask Uncle Colin: A Limiting Issue

Jan 26, 2016

Wrong, But Useful: Episode 32

Jan 25, 2016

How the Mathematical Ninja approximates factorials, revisited

Jan 20, 2016

Ask Uncle Colin: The Last Two Digits

Jan 18, 2016

Decimal curiosities

Jan 13, 2016

Ask Uncle Colin: What is $\infty \div 2$?

Jan 11, 2016

How the Mathematical Ninja estimates factorials

Jan 6, 2016

Ask Uncle Colin: How can I beat my little sister?

Jan 4, 2016

Where do the suvat equations come from?

Dec 30, 2015

Ask Uncle Colin: A Modulo Mistake

Dec 28, 2015

A trigonometric coincidence

Dec 24, 2015

Wrong, But Useful: Episode 31

Dec 23, 2015

Ask Uncle Colin: about summation notation

Dec 21, 2015

Is applied maths less satisfying than pure?

Dec 16, 2015

Ask Uncle Colin: A hellish trigonometric identity

Dec 15, 2015

Review: Mathador Chronos

Dec 14, 2015

"Destiny"

Dec 9, 2015

Ask Uncle Colin: Cambridge!

Dec 8, 2015

Review: The Joy of $x$, by Steven Strogatz

Dec 7, 2015

Mathematical Zombie: the sticks and crossings method

Dec 2, 2015

Ask Uncle Colin: An emergency limit!

Dec 1, 2015

Review: The Ideas Factory, by Jon Gertner

Nov 30, 2015

Matrix Determinants -- TMTOWTDI

Nov 25, 2015

Ask Uncle Colin: Missing Numbers

Nov 24, 2015

Review: Birth of a Theorem, by Cédric Villani

Nov 23, 2015

Wrong, But Useful, Episode 30: MathsJam Special

Nov 18, 2015

Ask Uncle Colin: Random Points on a Sphere

Nov 17, 2015

Review: The Numbers Game, by Chris Anderson and David Sally

Nov 16, 2015

How the Mathematical Pirate works out the high times tables

Nov 11, 2015

Ask Uncle Colin: Multiplying negatives

Nov 10, 2015

Review: The Signal and the Noise, by Nate Silver

Nov 9, 2015

How the Mathematical Ninja estimates logarithms

Nov 4, 2015

Ask Uncle Colin: Is my friend crazy?

Nov 3, 2015

Review: Sumaze

Nov 2, 2015

Rewriting a function without going piecewise

Oct 28, 2015

Ask Uncle Colin: A logarithmic coincidence?

Oct 27, 2015

Review: Things To Make And Do In The Fourth Dimension, by Matt Parker

Oct 26, 2015

An interesting GCSE triangle

Oct 22, 2015

Wrong, But Useful: Episode 29

Oct 21, 2015

Ask Uncle Colin: an integral that's giving me a headache

Oct 19, 2015

The Maths Police (Financial Unit) Investigate

Oct 14, 2015

Ask Uncle Colin: two almost-matching sequences

Oct 12, 2015

The times table game

Oct 7, 2015

Ask Uncle Colin: An imaginary curve?

Oct 5, 2015

Highest common factor and least common multiple - TMTOWTDI

Sep 30, 2015

Ask Uncle Colin: how do you find the intersection of three circles?

Sep 28, 2015

The Mathematical Ninja and the Powers of 10

Sep 23, 2015

Ask Uncle Colin: Are the log laws... lacking?

Sep 21, 2015

There's More Than One Way To Do It: Differential Equations

Sep 16, 2015

Ask Uncle Colin: Multiple workers

Sep 14, 2015

How the Mathematical Ninja multiplies by 67

Sep 9, 2015

Ask Uncle Colin: simplifying fractions

Sep 7, 2015

The inverse square law

Sep 2, 2015

Ask Uncle Colin: A nasty triangle

Aug 31, 2015

The Mathematical Ninja and Ailles' Rectangle

Aug 28, 2015

Wrong, But Useful, Episode 28

Aug 26, 2015

Ask Uncle Colin: a disguised quadratic

Aug 24, 2015

Using continued fractions to generate rational approximations

Aug 19, 2015

Ask Uncle Colin: How do I look at matrices

Aug 17, 2015

How the Mathematical Ninja explains the Mathematical Pirate's circle trick

Aug 12, 2015

Ask Uncle Colin: why does the Newton-Raphson method work?

Aug 10, 2015

How the Mathematical Pirate finds the centre and radius of a circle

Aug 5, 2015

Ask Uncle Colin: a proof with logs in

Aug 3, 2015

NME: The Sound Of Silence

Jul 29, 2015

Ask Uncle Colin: a topological conundrum

Jul 27, 2015

Common sense v Mathematical accuracy

Jul 22, 2015

Ask Uncle Colin: A Sticky Integral

Jul 20, 2015

My mathematical journey

Jul 15, 2015

Ask Uncle Colin: These percentages don't add up!

Jul 13, 2015

Wrong, but Useful -- Episode 27

Jul 8, 2015

Ask Uncle Colin: These alcohol-related figures look a bit fuzzy

Jul 6, 2015

A tennis puzzle

Jul 1, 2015

Ask Uncle Colin: Is the Fibonacci series witchcraft?

Jun 29, 2015

Why is $(2+\sqrt{3})^n$ nearly an integer?

Jun 24, 2015

An ex-Formula 1 driver asks... why does nobody ever ask me my opinion?

Jun 22, 2015

Sport, maths, twitter and hulk-smashing (a rant)

Jun 17, 2015

A challenge question

Jun 15, 2015

Building yurts using vectors

Jun 10, 2015

Are you A-level ready?

Jun 8, 2015

A student asks: how do I manage nerves in my exam?

Jun 5, 2015

Leave poor Hannah alone!

Jun 3, 2015

Wrong, but Useful: Episode 26

Jun 1, 2015

The Last Minute GCSE Revision Checklist

May 27, 2015

Conditional probability and the normal distribution

May 25, 2015

How do I decide whether to take things away from 1 (Normal distribution)

May 20, 2015

Why are there so many equations for variance?

May 18, 2015

A circle problem that succumbs to a circle theorem

May 13, 2015

Getting your $x$s in one basket

May 11, 2015

Minecraft circles

May 6, 2015

A great student question

May 4, 2015

Attack of the Mathematical Zombies: Five excuses that need a bullet to the head

Apr 29, 2015

Wrong, But Useful: Episode 25

Apr 27, 2015

The Egoless Mathematician

Apr 22, 2015

Finding a limit

Apr 20, 2015

Normals to an ellipse: a Core 4 masterclass

Apr 15, 2015

Why logs and exponentials undo each other

Apr 13, 2015

Picking a station

Apr 8, 2015

Using flashcards effectively

Apr 6, 2015

A MathsJam Masterclass

Apr 1, 2015

Udo of Aachen: Lives of the Mathematical Ninja

Mar 30, 2015

Book review: Secrets of Creation (Volume I)

Mar 25, 2015

How high do things bounce on the moon?

Mar 23, 2015

How to put your problems right

Mar 18, 2015

My mocks were a disaster - what now?

Mar 16, 2015

How I approximated $\pi$ for "Pi Day"

Mar 13, 2015

Wrong, But Useful: Episode 24

Mar 11, 2015

It's the way they write the questions: a case study

Mar 9, 2015

Factorise or factor?

Mar 4, 2015

Integrating $\sec^4(x)$

Mar 2, 2015

Dividing by 63

Feb 25, 2015

Game review: Anadrome

Feb 23, 2015

Three simple tricks I wish my GCSE students would use

Feb 18, 2015

A student asks: How can I make M1 less confusing?

Feb 16, 2015

Wrong, But Useful: Episode 23

Feb 11, 2015

A student asks: how do I revise in a hurry?

Feb 9, 2015

Taking Trigonometry Further

Feb 4, 2015

"A little biter of a question"

Feb 2, 2015

The Mathematical Ninja shuttles some numbers

Jan 28, 2015

How to ask for help

Jan 26, 2015

Simplifying

Jan 21, 2015

Prim vs Kruskal

Jan 19, 2015

The Mathematical Ninja and The $n$th Term

Jan 14, 2015

A Gardner-esque puzzle

Jan 12, 2015

Wrong, But Useful - Episode 22

Jan 7, 2015

The Curse of the Mathematician

Jan 5, 2015

How would you work out $3^{0.7}$?

Dec 31, 2014

The pull of the planets

Dec 29, 2014

A student asks... about percentages

Dec 24, 2014

A student asks: upper bounds

Dec 22, 2014

The Attack of the Mathematical Zombie: $(a+b)^2$

Dec 17, 2014

Why $\log_{10} (2) \simeq 0.3$

Dec 15, 2014

A “Proof” that 1 = 2

Dec 10, 2014

Equation of a circle: the Mathematical Ninja

Dec 8, 2014

Wrong, But Useful - Episode 21

Dec 3, 2014

A multiplication pattern

Dec 1, 2014

Why you can’t get unlimited chocolate (at least like this)

Nov 26, 2014

A baseball with your name on it

Nov 24, 2014

Proving a nice pattern

Nov 19, 2014

The Mathematical Ninja takes on the Wall Game

Nov 17, 2014

How big a lead can a football team have?

Nov 12, 2014

Radians (and why they are better than degrees)

Nov 10, 2014

HOW much rice?

Nov 7, 2014

Wrong, But Useful: Episode 20

Nov 5, 2014

That pesky constant

Nov 3, 2014

Why does $x^3 e^{-x}$ go to zero as $x$ goes to infinity?

Oct 29, 2014

$n$ maths blogs I often read

Oct 27, 2014

Probability and prediction

Oct 22, 2014

What percentage of numbers have a seven in?

Oct 20, 2014

Wrong, But Useful: Episode 19

Oct 15, 2014

The Mathematical Pirate and the Formula Triangle

Oct 13, 2014

Using Anki to learn and revise

Oct 8, 2014

How can I avoid mistakes?

Oct 6, 2014

An awkward inequality

Oct 1, 2014

277.42 reasons why we shouldn't readopt the imperial system

Sep 29, 2014

Estimating $e$

Sep 24, 2014

The Maths Police Investigate: IndyRef edition

Sep 22, 2014

The Mathematical Ninja and the Supposedly Funny Cat

Sep 17, 2014

Does attitude really equal 100%?

Sep 15, 2014

How do I estimate?

Sep 10, 2014

Wrong, But Useful: Episode 18

Sep 8, 2014

L’Hôpital’s Rule - what it is and why it works

Sep 1, 2014

“Just invert and multiply”

Aug 27, 2014

The Mathematical Pirate’s Guide to Factorising Cubics

Aug 25, 2014

Rote vs readiness

Aug 20, 2014

Arccosine: secrets of the Mathematical Ninja

Aug 18, 2014

BBC Sport’s anti-smartness bias

Aug 13, 2014

Wrong, But Useful: Episode 17

Aug 11, 2014

Powers of $e$ revisited: Secrets of the Mathematical Ninja

Aug 6, 2014

Why we lose mathematicians (a hypothesis)

Aug 4, 2014

Poissons and binomials

Jul 30, 2014

$\left(1+ \frac {1}{n}\right)^n$

Jul 28, 2014

A student asks: How do you simplify surds?

Jul 23, 2014

A trigonometric trick: Secrets of the Mathematical Ninja

Jul 21, 2014

Euclid the Game: level 20

Jul 16, 2014

A proof of the sine rule

Jul 14, 2014

A Ninja Masterclass

Jul 9, 2014

Tamil Fractions

Jul 7, 2014

Ten books that stayed with me

Jul 2, 2014

Wrong, But Useful: Episode 16

Jun 30, 2014

Why the Maclaurin series gives you Pascal's Triangle

Jun 25, 2014

Which is larger?

Jun 23, 2014

A numerical curiosity

Jun 18, 2014

Why is $\arcosh$ the positive root?

Jun 16, 2014

Complex mappings

Jun 11, 2014

The Dreadful Truth About The Table of Joy

Jun 9, 2014

There's More Than One Way To Do It: Arithmetic Series

Jun 6, 2014

Wrong, But Useful: Episode 15

Jun 4, 2014

A student asks: Why is there a $+c$ when you integrate?

Jun 2, 2014

Secrets of the Mathematical Pirate: Switcheroos

May 28, 2014

Why are outliers defined like THAT?!

May 26, 2014

Boodles: Secrets of the Mathematical Ninja

May 21, 2014

Nine ways to revise for the GCSE Calculator paper

May 19, 2014

Recurring decimals: Secrets of the Mathematical Ninja

May 14, 2014

The C1 Last-Minute Panic Checklist

May 12, 2014

A student asks: why do you love maths so much?

May 7, 2014

Carnival of Mathematics, 110

May 5, 2014

Finding constants for a line or curve - Secrets of the Mathematical Ninja

May 2, 2014

Wrong, But Useful: Episode 14

Apr 30, 2014

Simplifying algebraic fractions (GCSE algebra)

Apr 30, 2014

Simplifying algebraic fractions (GCSE algebra)

Apr 28, 2014

A student asks: Why does variance do THAT?

Apr 23, 2014

Book review: Vedic Mathematics

Apr 21, 2014

The Sausage Rule: Secrets of the Mathematical Ninja

Apr 16, 2014

Dealing with nasty powers

Apr 14, 2014

The square root of three: Secrets of the Mathematical Ninja

Apr 9, 2014

The semicircle puzzle

Apr 7, 2014

How to remember which way the skewness goes

Apr 2, 2014

How The Mathematical Ninja Divides By 49

Mar 31, 2014

There's More Than One Way To Do It: Direct and Inverse Proportion

Mar 27, 2014

Wrong, But Useful: Episode 13

Mar 26, 2014

A riposte to the Mathematical Ninja!

Mar 24, 2014

The Equation of a Straight Line: Secrets of the Mathematical Ninja

Mar 19, 2014

Is there a tangent rule?

Mar 17, 2014

$6\times4$ or $4\times6$?

Mar 14, 2014

Sam Warburton's Dilemma

Mar 12, 2014

A student asks... about quadratics

Mar 10, 2014

Two mysteries cleared up in one

Mar 5, 2014

Equations of a straight line: Secrets of the Mathematical Ninja

Mar 3, 2014

Logarithmic inequalities, and why I always used to get them wrong

Feb 26, 2014

Wrong, But Useful: Episode 12

Feb 24, 2014

Multiplying halves by halves: Secrets of the Mathematical Ninja

Feb 19, 2014

Why is the sum of five consecutive squares never a square?

Feb 17, 2014

Linear Interpolation: There's More Than One Way To Do It

Feb 12, 2014

Why negative and fractional powers work the way they do

Feb 10, 2014

Figuring out roots of horrible numbers

Feb 5, 2014

A student asks: what's it like to do a maths degree?

Feb 3, 2014

Blazing through the Binomial Expansion

Jan 29, 2014

Quotients and remainders

Jan 27, 2014

Wrong, But Useful - Episode 11

Jan 22, 2014

Proving three points lie on a straight line (GCSE vectors)

Jan 22, 2014

Proving three points lie on a straight line (GCSE vectors)

Jan 20, 2014

Why the maths of infinite sums is dangerous

Jan 15, 2014

Why I don't buy that $1 + 2 + 3 + ... = -\frac{1}{12}$

Jan 13, 2014

Inverse sines near a half: Secrets of the Mathematical Ninja

Jan 8, 2014

Dealing with M1 vectors

Jan 6, 2014

Wrong, But Useful: Episode 10

Jan 1, 2014

The Compulsory New Year's Resolution post

Dec 30, 2013

Book Review: Nix The Tricks

Dec 25, 2013

Maths Police Christmas Special

Dec 23, 2013

The heptagon puzzle

Dec 18, 2013

Integration by parts: how you do it, and why it works

Dec 16, 2013

There's More Than One Way To Do It: Algebraic Division

Dec 11, 2013

Book review: Passion For Science

Dec 9, 2013

A student asks... I need to get my grade up: HELP!

Dec 5, 2013

Wrong, but Useful: Episode 9

Dec 4, 2013

PISA results: my thoughts

Dec 3, 2013

Call for guest posts

Dec 2, 2013

There's More Than One Way To Do It: Equations of a circle

Nov 27, 2013

How the gravitational slingshot works

Nov 25, 2013

How I factorise quadratics these days

Nov 20, 2013

A student asks... about the Simplex Algorithm

Nov 18, 2013

Tactical preference voting

Nov 13, 2013

Escoffier, Joyce and Einstein

Nov 11, 2013

Exact trig values - Secrets of the Mathematical Ninja

Nov 6, 2013

Why I loved the MathsJam conference

Nov 4, 2013

Heroic triangles

Oct 30, 2013

A reader asks... about matrices

Oct 28, 2013

Normal distribution - but fast! Secrets of the Mathematical Ninja

Oct 24, 2013

Wrong, But Useful: Episode 8

Oct 23, 2013

Why $17 \times 24$ isn't 568

Oct 21, 2013

Why you don't add across probability trees - Secrets of the Mathematical Ninja

Oct 16, 2013

The geometry of $\sec$

Oct 15, 2013

John Halpern's TEDx talk on crosswords

Oct 14, 2013

The Mathematical Ninja gets mean

Oct 9, 2013

Dividing by 42 - Secrets of the Mathematical Ninja

Oct 7, 2013

The Bayesian umbrella

Oct 2, 2013

Scheduling a Scrabble tournament

Sep 30, 2013

Cosines of small angles - Secrets of the Mathematical Ninja

Sep 27, 2013

Last-ditch begging: sponsor me. Please?

Sep 26, 2013

Wrong, But Useful: Episode 7

Sep 25, 2013

Review: Beating the Odds, by Rob Eastaway and John Haigh

Sep 23, 2013

TMTOWTDI: Subtraction

Sep 18, 2013

Maths: You've got it all wrong

Sep 16, 2013

Two trains and a fly

Sep 11, 2013

Sorting a list on the fly

Sep 9, 2013

Billy Beane: Lives of the Mathematical Ninja

Sep 4, 2013

The Mathematical Pirate's guide to the Chain Rule

Sep 2, 2013

Is mathematics discovered or invented?

Aug 29, 2013

Wrong, But Useful: Episode 6

Aug 28, 2013

Why I Can See My Car works

Aug 26, 2013

The Baffling Case of the Boscombe Boffin

Aug 21, 2013

When BIDMAS goes bad

Aug 21, 2013

When BIDMAS goes bad

Aug 19, 2013

Gerolamo Cardano: Lives of the Mathematical Ninja

Aug 14, 2013

Review: The Theory That Would Not Die - Sharon Bertsch McGrayne

Aug 12, 2013

A talk! A talk!

Aug 7, 2013

A reader asks: The Chain Rule

Aug 5, 2013

How the Mathematical Ninja integrates

Aug 1, 2013

Wrong, But Useful: Episode 5

Jul 31, 2013

A reader asks: How does the circle of fifths work?

Jul 29, 2013

The Tau of SUVAT

Jul 24, 2013

Pascal's tetrahedron

Jul 22, 2013

Fibonacci kilometres: how the Mathematical Ninja converts (and how mere mortals can, too)

Jul 17, 2013

Review: The Noteboard

Jul 15, 2013

Basic maths skills: the ice cream portion

Jul 10, 2013

How related are Alice and Bob?

Jul 8, 2013

Why the binomial expansion is stupid and you shouldn't use it

Jul 4, 2013

Wrong, but Useful: Episode 4

Jul 3, 2013

A reader asks: why does $1+1=2$?

Jul 1, 2013

How the Mathematical Ninja squares brackets

Jun 26, 2013

Book review: Mathematics: A Novel

Jun 24, 2013

Calculator on order: basic maths and orders of magnitude

Jun 21, 2013

Silly Questions Amnesty

Jun 19, 2013

Centres of rotation

Jun 17, 2013

The Mathematical Ninja's C4 Paper

Jun 14, 2013

Silly Questions Amnesty

Jun 13, 2013

The EdExcel C3 debacle: initial thoughts

Jun 12, 2013

Maths Police Investigates: The Case of The Clotted Cream Formula

Jun 10, 2013

Secrets of the Mathematical Ninja: Taylor series and the product rule

Jun 7, 2013

Silly Questions Amnesty

Jun 5, 2013

The butterfly isn't to blame

Jun 3, 2013

The Mathematical Ninja's Guide To Famous Triangles

May 31, 2013

Silly Questions Amnesty

May 30, 2013

Wrong, But Useful: Episode 3

May 29, 2013

Maths in the real world: flowerpot volumes

May 27, 2013

Florence Nightingale: Lives of the Mathematical Ninja

May 24, 2013

Silly Questions Amnesty

May 22, 2013

A nasty proof: angle bisectors and ellipses

May 20, 2013

An insight into the mathematical mind: Box-Muller transforms

May 17, 2013

Silly Questions Amnesty

May 15, 2013

What's the difference between $x$ and $x_0$?

May 13, 2013

Basic Maths Skills: How Estimating Saved Me Nearly &dollar;30

May 10, 2013

Silly Questions Amnesty

May 8, 2013

The Mathematical Ninja's Topological Takedown

May 6, 2013

The Mathematical Ninja's Guide To Roundish Numbers

May 3, 2013

Silly Questions Amnesty

May 2, 2013

Wrong, But Useful: Episode 2

May 1, 2013

Sketching graphs: the DATA method

Apr 29, 2013

Basic Maths Skills: Listening to the budget (big numbers)

Apr 26, 2013

Silly Questions Amnesty

Apr 24, 2013

Why is the volume of a pyramid what it is?

Apr 22, 2013

The Mathematical Ninja's Ten Coolest Numbers

Apr 19, 2013

Silly Questions Amnesty

Apr 17, 2013

A reader asks: how long would you last in a casino?

Apr 15, 2013

QTS Skills: Working out a percentage of a number

Apr 12, 2013

Silly Questions Amnesty

Apr 10, 2013

A litany of errors, or James Bloody Grime's Blasted Logarithms Revisited

Apr 8, 2013

The Mathematical Ninja's Rules of Fractions

Apr 5, 2013

Carnival of Mathematics 97

Apr 3, 2013

GCSE Factorising revision

Apr 1, 2013

BREAKING NEWS: Largest prime discovered

Apr 1, 2013

Basic Maths Skills: The Falklands Islands, Percentages and Bounds

Mar 29, 2013

Silly Questions Amnesty

Mar 28, 2013

Wrong, but Useful: Episode 1

Mar 27, 2013

Book review: The Man Who Loved Only Numbers

Mar 25, 2013

Angle patterns on the unit circle

Mar 22, 2013

Silly Questions Amnesty

Mar 20, 2013

The Peculiar Maths of Birthdays

Mar 18, 2013

János Bolyai - Lives of the Mathematical Ninja

Mar 15, 2013

Silly Questions Amnesty

Mar 13, 2013

Bringing out the big gnus: runs of coins

Mar 11, 2013

How the mathematical ninja looks at sums

Mar 8, 2013

Silly Questions Amnesty

Mar 6, 2013

How paper beat compass and straight-edge

Mar 4, 2013

Multiplying by 9 on the fly

Mar 1, 2013

Silly Questions Amnesty

Feb 25, 2013

Summing a geometric series: Secrets of the Mathematical Ninja

Feb 22, 2013

Silly Questions Amnesty

Feb 20, 2013

Another Facebook Question (Which I Only Sort Of Answer)

Feb 18, 2013

Squaring biggish numbers, revisited

Feb 15, 2013

Silly Questions Amnesty

Feb 13, 2013

The 23 problems joke

Feb 11, 2013

Lives of the Mathematical Ninja: Evariste Galois

Feb 8, 2013

Silly Questions Amnesty

Feb 6, 2013

Bayes' Theorem and Minesweeper

Feb 4, 2013

Why the Mathematical Ninja hopes for a hard exam

Feb 1, 2013

Silly Questions Amnesty

Jan 30, 2013

Book review: Alex's Adventures In Numberland by Alex Bellos

Jan 28, 2013

Dividing by 9 - Secrets of the Mathematical Ninja

Jan 25, 2013

Silly Questions Amnesty

Jan 23, 2013

James Bloody Grime and his blasted logarithms

Jan 21, 2013

The Rule of 72: Secrets of the Mathematical Ninja

Jan 18, 2013

Silly Questions Amnesty

Jan 16, 2013

How to think about co-ordinate geometry (Part III: Circles, tangents and so on)

Jan 14, 2013

Lives of the Mathematical Ninja: Blaise Pascal

Jan 11, 2013

Silly Questions Amnesty

Jan 9, 2013

How to think about co-ordinate geometry (Part II: curves, tangents and normals)

Jan 7, 2013

Remembering how to differentiate - Secrets of the Mathematical Ninja

Jan 4, 2013

Silly Questions Amnesty

Jan 2, 2013

How to think about co-ordinate geometry (Part I: the equation of a line)

Dec 31, 2012

What day of the week is it? It's DOOMSDAY! Secrets of the Mathematical Ninja

Dec 28, 2012

Silly Questions Amnesty

Dec 27, 2012

Quotable Maths: Nightingale

Dec 24, 2012

Recurring Decimals - Secrets of the Mathematical Ninja

Dec 22, 2012

Did the world end yesterday?

Dec 21, 2012

Silly Questions Amnesty

Dec 20, 2012

Quotable Maths: Knuth

Dec 19, 2012

Algebraic Fractions: A reader asks

Dec 18, 2012

How to get a C in GCSE Maths without becoming a nervous wreck.

Dec 18, 2012

How to get a C in GCSE Maths without becoming a nervous wreck

Dec 17, 2012

Thirteenths (Part 3/3): Secrets of the Mathematical Ninja

Dec 14, 2012

Silly Questions Amnesty

Dec 13, 2012

Quotable Maths: Arnold

Dec 12, 2012

Oh God, Make It Go Away.

Dec 10, 2012

Thirteenths (Part 2/3): Secrets of the Mathematical Ninja

Dec 7, 2012

Silly questions amnesty

Dec 6, 2012

Quotable Maths: Lang

Dec 6, 2012

Alice in Wonderland talk in Weymouth, December 15th

Dec 5, 2012

Why are the ninja secrets important?

Dec 3, 2012

Thirteenths (Part 1/3): Secrets of the Mathematical Ninja

Nov 30, 2012

Silly Questions Amnesty

Nov 29, 2012

Quotable Maths: Karlin

Nov 28, 2012

The Age of Maths

Nov 26, 2012

Secrets of the Mathematical Ninja: Percentage adjustments

Nov 23, 2012

Silly Questions Amnesty

Nov 22, 2012

Quotable maths: Rosenlicht

Nov 21, 2012

A Co-Proof of the Birthday Problem

Nov 19, 2012

Secrets of the Mathematical Ninja: The magic of 0.7

Nov 16, 2012

Silly Questions Amnesty

Nov 14, 2012

Would an infinite number of monkeys eventually write Shakespeare?

Nov 12, 2012

Cancelling Fractions - Secrets of the Mathematical Ninja

Nov 9, 2012

Silly Questions Amnesty

Nov 8, 2012

Quotable maths: Chesterton

Nov 7, 2012

The Elements of Mathematical Style (Version 0.1)

Nov 5, 2012

R sin alpha: Secrets of the Mathematical Ninja

Nov 2, 2012

Silly Questions Amnesty

Nov 1, 2012

Quotable Maths: Carroll

Oct 31, 2012

Matrices and Google

Oct 29, 2012

Secrets of the Mathematical Ninja: How to be a g-whizz

Oct 26, 2012

Silly Questions Amnesty

Oct 25, 2012

Quotable Maths: Smith

Oct 24, 2012

Book Review: Euler’s Gem, by David S Richeson

Oct 22, 2012

The Lives of the Mathematical Ninja: Bourbaki

Oct 19, 2012

Silly Questions Amnesty

Oct 18, 2012

Quotable maths: Krishna

Oct 17, 2012

Why is the dot product the way it is?

Oct 15, 2012

Secrets of the Mathematical Ninja: Sine and cosine (part II)

Oct 12, 2012

Silly Questions Amnesty

Oct 11, 2012

Quotable maths: Nicely

Oct 10, 2012

Book review: 17 Equations That Changed The World, by Ian Stewart

Oct 8, 2012

Secrets of the Mathematical Ninja: multiplying numbers that are close together

Oct 5, 2012

Silly Questions Amnesty

Oct 4, 2012

Wimborne Literary Festival: Uglification and Derision

Oct 4, 2012

Quotable maths: Hofstadter

Oct 3, 2012

The cynic's guide to getting a C at GCSE

Oct 1, 2012

Secrets of the Mathematical Ninja: Sine, cosine and what they really mean (part I)

Sep 28, 2012

Silly Questions Amnesty

Sep 27, 2012

Quotable maths: Turing

Sep 26, 2012

A reader asks...

Sep 24, 2012

Secrets of the Mathematical Ninja: Converting radians to degrees (precisely)

Sep 21, 2012

Silly Questions Amnesty

Sep 20, 2012

Quotable maths: Kline

Sep 19, 2012

How to do a trigonometry proof: five top tips

Sep 19, 2012

How to do a trigonometry proof: five top tips

Sep 19, 2012

How to do a trigonometry proof: five top tips

Sep 17, 2012

The Lives* of the Mathematical Ninja: Srinivasa Ramanujan

Sep 14, 2012

Silly Questions Amnesty

Sep 13, 2012

Quotable maths: Bourbaki

Sep 12, 2012

How to pick a price for an e-book

Sep 10, 2012

Secrets of the Mathematical Ninja - nth roots (in your head)

Sep 7, 2012

Silly Questions Amnesty

Sep 6, 2012

Quotable maths: Roberts

Sep 5, 2012

The Names of the Isle of Portland

Sep 3, 2012

Secrets of the Mathematical Ninja: Estimating powers of e

Aug 31, 2012

Silly Questions Amnesty

Aug 30, 2012

Quotable maths: Armstrong

Aug 29, 2012

Five ways that maths is stoopid

Aug 27, 2012

Secrets of the mathematical ninja: Estimating natural logs

Aug 24, 2012

Silly Questions Amnesty

Aug 23, 2012

Quotable maths: Fisher

Aug 22, 2012

The making of a mathematician (Episode I)

Aug 20, 2012

The Lives of the Mathematical Ninja: Paul Erdős

Aug 17, 2012

Silly questions amnesty

Aug 16, 2012

Quotable maths: Raleigh

Aug 15, 2012

Five things Mo Farah can teach you about maths (and other things too)

Aug 13, 2012

The Lives of the Mathematical Ninja: Student

Aug 10, 2012

Silly questions amnesty

Aug 9, 2012

Quotable maths: Galileo

Aug 8, 2012

Five ways to stop feeling self-conscious about drawing graphs

Aug 6, 2012

The Lives of the Mathematical Ninjas: Benoit B Mandelbrot

Aug 3, 2012

Silly questions amnesty

Aug 2, 2012

Quotable maths: Hopper

Aug 1, 2012

Those medalling kids: knockout tournaments and who wins what?

Jul 30, 2012

The Lives of the Mathematical Ninjas: Leonardo

Jul 27, 2012

Silly questions amnesty

Jul 26, 2012

Quotable maths: Pratchett

Jul 25, 2012

Blank slate time...

Jul 23, 2012

Secrets of the Mathematical Ninja: One, many and standard form

Jul 20, 2012

Silly questions amnesty

Jul 19, 2012

Quotable maths: Stout

Jul 18, 2012

A question to which I don't know the answer: how to pick a parking space.

Jul 16, 2012

Secrets of the Mathematical Ninja: Squaring three-digit numbers, part III

Jul 13, 2012

Silly questions amnesty

Jul 12, 2012

Quotable maths: Lehrer

Jul 11, 2012

Tackling 'When Will I Ever Use This?'

Jul 9, 2012

Secrets of the Mathematical Ninja: Squaring three-digit numbers (Part II)

Jul 6, 2012

Silly questions amnesty

Jul 5, 2012

Quotable Maths - Thoreau

Jul 4, 2012

How to replace exams

Jul 2, 2012

Secrets of the Mathematical Ninja: Squaring three-digit numbers (Part I)

Jun 29, 2012

Free for all Friday

Jun 28, 2012

Quotable maths - McKiver

Jun 27, 2012

ERROR 101 SENSE NOT MADE: the lunacy of programming exams on paper.

Jun 25, 2012

The secrets of the mathematical ninja: converting awkward fractions to decimals.

Jun 22, 2012

Free for all Friday (Midsummer edition)

Jun 21, 2012

Quotable maths - Pooh

Jun 20, 2012

Michael Gove's Dinner Party

Jun 18, 2012

Secrets of the Mathematical Ninja: Pascal's Triangle

Jun 15, 2012

Free for all Friday

Jun 14, 2012

Quotable maths - Adams

Jun 13, 2012

"How do I know which method to use?" - How to Integrate

Jun 11, 2012

The Way Of The Mathematical Ninja

Jun 8, 2012

Free for all Friday

Jun 7, 2012

Quotable maths - Tufnel

Jun 6, 2012

A neat number trick: digital roots and modulo-9 arithmetic

Jun 4, 2012

Secrets of the Mathematical Ninja: Sines and cosines near 45º

Jun 1, 2012

Free for all Friday

May 31, 2012

Quotable maths - Whitehead

May 30, 2012

Football, frustration and maths

May 28, 2012

Secrets of the Mathematical Ninja: Trigonometry With Small Numbers

May 25, 2012

Free for all Friday

May 24, 2012

Quotable maths - Dylan

May 23, 2012

The Most Massive Myth that Messes With Maths Mastery

May 21, 2012

The Secrets of the Mathematical Ninja: The World's Third Most Famous Triangle

May 18, 2012

Free for all Friday

May 17, 2012

Quotable maths - Paulos

May 16, 2012

Why maths exams are not just stupid but actively harmful (reprise)

May 14, 2012

Secrets of the Mathematical Ninja: Converting degrees into radians

May 11, 2012

Free for all Friday

May 10, 2012

Quotable maths - Huxley

May 9, 2012

The Roulette Wheel and its Distributions

May 7, 2012

The Secrets of the Ninja Mathematician: An Apology To Base 10 Logarithms

May 4, 2012

Free for all Friday

May 3, 2012

Quotable maths - Schrödinger

May 2, 2012

Five foolish fraction foul-ups that keep costing you points

Apr 30, 2012

The Secrets of the Mathematical Ninja: James Martin and the 952 Countdown puzzle.

Apr 30, 2012

The Secrets of the Mathematical Ninja: James Martin and the 952 Countdown puzzle.

Apr 30, 2012

The Secrets of the Mathematical Ninja: James Martin and the 952 Countdown puzzle

Apr 27, 2012

Free for all Friday

Apr 26, 2012

Quotable maths - Goethe

Apr 25, 2012

The Law of Inverse Ninjas

Apr 23, 2012

Secrets Of The Mathematical Ninja: Adjusting using errors.

Apr 20, 2012

Free for all Friday

Apr 19, 2012

Quotable maths - Hilbert

Apr 18, 2012

The insidious maths of payday loans (with added logarithms)

Apr 16, 2012

Secrets of the mathematical ninja: some numbers worth knowing

Apr 13, 2012

Free for all Friday

Apr 12, 2012

Quotable maths - Polya

Apr 11, 2012

Completing the square - the easy way

Apr 9, 2012

Secrets of the Mathematical Ninja: The surprising integration rule you don't get taught in school

Apr 6, 2012

Free for all Friday (Good Friday edition)

Apr 5, 2012

Quotable maths - Edison

Apr 4, 2012

The three secrets to successful revision

Apr 2, 2012

Secrets of the Mathematical Ninja: powers near 1

Mar 30, 2012

Free for all Friday

Mar 29, 2012

Quotable maths: Bohr

Mar 28, 2012

What is a circle? (and how do you answer C2 questions about it?)

Mar 26, 2012

Secrets of the mathematical ninja: Divisibility tricks

Mar 23, 2012

Free for all Friday

Mar 22, 2012

Quotable maths: Lennon

Mar 21, 2012

Where to start when you don't know where to start

Mar 19, 2012

Secrets of the Mathematical Ninja: squares near 50.

Mar 16, 2012

Free for all Friday

Mar 15, 2012

Quotable maths: von Neumann

Mar 14, 2012

Happy $\pi$ day!

Mar 12, 2012

Squaring halves (and fives): Mathematical Ninja Secrets

Mar 9, 2012

Free for all Friday

Mar 8, 2012

Quotable maths: Russell

Mar 7, 2012

A tricky C2 question...

Mar 5, 2012

Uswitch, units and unitwit

Mar 2, 2012

Free for all Friday

Mar 1, 2012

Quotable maths: Erdős

Feb 29, 2012

Statistics and the court of law

Feb 27, 2012

The easy way to factorise nasty quadratics

Feb 24, 2012

Free for all Friday

Feb 23, 2012

Quotable maths: Feynman

Feb 22, 2012

The smart way to do the binomial expansion (Part II)

Feb 20, 2012

The smart way to do the binomial expansion (Part 1)

Feb 17, 2012

Free for all Friday - Valentine's week edition

Feb 16, 2012

Quotable maths: Einstein

Feb 15, 2012

Three good reasons you divide when you integrate

Feb 13, 2012

The trig identities you need to know for integration

Feb 10, 2012

Free-for-all Friday!

Feb 9, 2012

Quotable maths: Rényi

Feb 8, 2012

The maths of the decathlon

Feb 6, 2012

The crazy way you have to integrate logs

Feb 3, 2012

Free for all Friday

Feb 1, 2012

Why SOH CAH TOA is stupid (and what you can do instead)

Jan 30, 2012

Questions with only one answer

Jan 27, 2012

Free for all Friday

Jan 25, 2012

The Line of Best Fit (Linear Regression)

Jan 23, 2012

How to do calculus with $a^x$

Jan 20, 2012

Free for all Friday

Jan 18, 2012

Why radians rock (and degrees don't)

Jan 16, 2012

How to do... R-sin-alpha questions

Jan 13, 2012

Free-for-all Friday

Jan 11, 2012

Aces in the pack

Jan 9, 2012

Core 1 graphs: all you need to know

Jan 9, 2012

Core 1 graphs: all you need to know

Jan 6, 2012

Free-for-all Friday

Jan 4, 2012

Don't Panic! How to hold off maths anxiety in your exam

Jan 2, 2012

What you need to know for Core 1 maths - a checklist

Dec 30, 2011

Free-for-all Friday

Dec 28, 2011

Seven ways to revise for a maths exam (plus one)

Dec 28, 2011

Seven ways to revise for a maths exam (plus one)

Dec 28, 2011

Seven ways to revise for a maths exam (plus one)

Dec 2, 2011

In praise of... watching football tournaments at exam time

Apr 4, 2011

Why AV is bad (for the BNP)

Oct 4, 2010

Bayes' Theorem, summer babies and that funny | symbol

Sep 5, 2010

Earthquake maths: A Whole Log Of Shaking

Sep 3, 2010

Everyday maths: Crossing the Road

Sep 1, 2010

Reverse engineering your prime birthday

Aug 30, 2010

The 'Dating Rule'

Jul 1, 2010

Four fraction failures you'd be a fool not to fix

Jun 27, 2010

How to give your kids help with maths homework

Jun 23, 2010

The Mystic Rose

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