Silly Questions Amnesty Mar 15, 2013 Another Friday, another SQA. It’s the Ides of March today - what do you need to beware of? A selection of other posts Oct 30, 2019 Ask Uncle Colin: Missing Planes Jul 16, 2014 A proof of the sine rule Jul 18, 2012 A question to which I don't know the answer: how to pick a parking space. Jan 9, 2012 Core 1 graphs: all you need to know subscribe via RSS