{"product_id":"9780008444495","title":"Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything - Rob Eastaway","description":"\u003cp\u003e              \u003cstrong\u003e'Another terrific book by Rob Eastaway' SIMON SINGH\u003c\/strong\u003e            \u003c\/p\u003e            \u003cp\u003e              \u003cstrong\u003e'A delightfully accessible guide to how to play with numbers' HANNAH FRY\u003c\/strong\u003e            \u003c\/p\u003e            \u003cp\u003eHow many cats are there in the world?\u003c\/p\u003e            \u003cp\u003eWhat's the chance of winning the lottery twice?\u003c\/p\u003e            \u003cp\u003eAnd just how long does it take to count to a million?\u003c\/p\u003e            \u003cp\u003eLearn how to tackle tricky maths problems with nothing but the back of an envelope, a pencil and some good old-fashioned brain power.\u003c\/p\u003e            \u003cp\u003eJoin Rob Eastaway as he takes an entertaining look at how to figure without a calculator. Packed with amusing anecdotes, quizzes, and handy calculation tips for every situation, \u003cem\u003eMaths on the Back of an Envelope\u003c\/em\u003e is an invaluable introduction to the art of estimation, and a welcome reminder that sometimes our own brain is the best tool we have to deal with numbers.\u003c\/p\u003e","brand":"HarperCollins Publishers","offers":[{"title":"Default Title","offer_id":44730453655779,"sku":"9780008444495","price":10.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1701\/6275\/files\/9780008444495.jpg?v=1712667807","url":"https:\/\/www.harbourbookshop.co.uk\/products\/9780008444495","provider":"The Harbour Bookshop","version":"1.0","type":"link"}