Quotable Maths - Thoreau Jul 5, 2012 A selection of other posts Sep 14, 2020 The Mathematical Ninja and the Power of Ten Jun 29, 2020 On Common Factors and Multiples Jan 6, 2016 Ask Uncle Colin: How can I beat my little sister? Jan 28, 2013 Dividing by 9 - Secrets of the Mathematical Ninja subscribe via RSS