Core 4 basics revision quiz Mar 19, 2013 [mtouchquiz 2] A selection of other posts Dec 17, 2018 Review: Festival of the Spoken Nerd, You Can't Polish A Nerd Feb 1, 2017 Ask Uncle Colin: A Triangle That's Not As Nice As It Looks Dec 28, 2016 Ask Uncle Colin: Find me a circle! Dec 10, 2014 Equation of a circle: the Mathematical Ninja subscribe via RSS