{"product_id":"maths-on-the-back-of-an-envelope-clever-ways-to-roughly-calculate-anything","title":"Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything","description":"\u003cp\u003e\n            \u003cstrong\u003e'Another terrific book by Rob Eastaway' SIMON SINGH\u003c\/strong\u003e\n          \u003c\/p\u003e\n          \u003cp\u003e\n            \u003cstrong\u003e'A delightfully accessible guide to how to play with numbers' HANNAH FRY\u003c\/strong\u003e\n          \u003c\/p\u003e\n          \u003cp\u003eHow many cats are there in the world?\u003c\/p\u003e\n          \u003cp\u003eWhat's the chance of winning the lottery twice?\u003c\/p\u003e\n          \u003cp\u003eAnd just how long does it take to count to a million?\u003c\/p\u003e\n          \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\n          \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\u003cp\u003e\u003cstrong\u003ePaperback \/ softback | 208 pages | Published January 1970\u003c\/strong\u003e\u003c\/p\u003e","brand":"HarperCollins","offers":[{"title":"Default Title","offer_id":63168819528029,"sku":"9780008444495","price":13.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/3459\/8749\/files\/9780008444495.jpg?v=1769014359","url":"https:\/\/www.thebookmark.ie\/products\/maths-on-the-back-of-an-envelope-clever-ways-to-roughly-calculate-anything","provider":"The Bookmark ","version":"1.0","type":"link"}