Quotable maths: Armstrong Aug 30, 2012 RIP, Neil Armstrong (1930-2012). A selection of other posts Oct 17, 2018 Ask Uncle Colin: Some number theory Feb 3, 2016 Ask Uncle Colin: A pentagonal rhombus Nov 9, 2015 How the Mathematical Ninja estimates logarithms Jul 5, 2012 Quotable Maths - Thoreau subscribe via RSS