Quotable maths: Lennon Mar 22, 2012 A selection of other posts Aug 19, 2019 Barney's Wedge Jan 22, 2014 Proving three points lie on a straight line (GCSE vectors) Dec 11, 2013 Book review: Passion For Science Oct 8, 2012 Secrets of the Mathematical Ninja: multiplying numbers that are close together subscribe via RSS