{"product_id":"maths-on-the-back-of-rob-eastaway-9780008444495","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\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Rob Eastaway\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 0008444498\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9780008444495\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e HarperCollins\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 06\/15\/2021\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 208\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.35lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 7.70h x 5.00w x 0.60d","brand":"Rob Eastaway","offers":[{"title":"Paperback","offer_id":44046641266943,"sku":"9780008444495","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_df98c606-ec41-4e9f-ae68-69c05d765e88.jpg?v=1684985664","url":"https:\/\/www.whiterainbookhouse.com\/products\/maths-on-the-back-of-rob-eastaway-9780008444495","provider":"WR Book House","version":"1.0","type":"link"}