How Many Socks Make a Pair?

Rob Eastaway is one of the UK's leading popularisers of maths. His books include the bestselling Why Do Buses Come in Threes? and Maths for Mums and Dads. He has written numerous newspaper and magazine articles, regularly appears on radio to talk about the maths of everyday life, and has given maths talks to audiences of all ages, at venues ranging from The Royal Institution to Pentonville Prison.