Core 3 basics revision quiz Apr 2, 2013 [mtouchquiz 4] A selection of other posts Apr 1, 2020 Ask Uncle Colin: Remainders Jan 9, 2019 Ask Uncle Colin: Integrating $\sec$ and $\cosec$ Jun 11, 2018 $\cos(72º)$, revisited: a geometric method Jul 16, 2012 Secrets of the Mathematical Ninja: Squaring three-digit numbers, part III subscribe via RSS