{"product_id":"9780008324599","title":"Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything","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":"Rob Eastaway","offers":[{"title":"Default Title","offer_id":47284831813781,"sku":"9780008324599","price":9.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0484\/3175\/9509\/files\/9780008324599.jpg?v=1776992065","url":"https:\/\/harpercollins.com.au\/products\/9780008324599","provider":"HarperCollins AU","version":"1.0","type":"link"}