As usual, that means you can use the comments thread to ask me any question you like. I’m most likely to know it if it’s maths, but no promises either way. I know other stuff, too — try me on Dylan lyrics.
Colin is a Weymouth maths tutor, author of several Maths For Dummies books and A-level maths guides. He started Flying Colours Maths in 2008.
He lives with an espresso pot and nothing to prove.