OK! It's the last Free for all Friday of the academic year! One last chance to ask all of those burning questions that have been on your mind.

Well, what can I help you with this week? Just drop me a comment below and I'll do what I can to answer it.

## Colin

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.