A maths teacher's solution to splitting restaurant bills has become a YouTube hit.
See the videos(link is external) or read today's article(link is external) in the national press.
Matt Parker's videos guide viewers through simple formulas, and also explain how to divide rent when a single person shares with couples. Matt works in Queen Mary's School of Mathematical Sciences as part of the More Maths Grads outreach team. He is also a stand-up comedian.