Rob Eastaway has been one of the UK's most successful popular maths authors of the last 15 years. His books include the bestselling Why Do Buses Come In Threes? and Maths for Mums and Dads. He is the Director of Maths Inspiration, a national programme of theatre-based lectureshows for 15-17 year olds that has reached over 150,000 teenagers since it began in 2004. Rob regularly gives talks to all age groups in primary and secondary schools, appears on BBC Radio 4's current affairs/numbers programme More or Less, and works closely with National Numeracy, the national charity that campaigns for better adult numeracy. In 2017, Rob received the Zeeman medal for excellence in communication of maths to the general public.
`A delightfully accessible guide to how to play with numbers' - Dr Hannah Fry, author of Hello World and The Mathematics of Love `Put aside those calculators and computers, and find a pen and piece of paper! In a collection of riveting tips and examples, Eastaway shows us amazing short-cuts to get rough answers to important questions. I still find it remarkable that 16% of 25 is exactly the same as 25% of 16!' - Professor Sir David Spiegelhalter, author of The Art of Statistics `Another terrific book by Rob Eastaway' - Simon Singh `Packed with fun examples and fresh ideas. I thought I was on top of this subject, but I learned a lot' - Tim Harford