Maths on the Back of an Envelope
Clever Ways to (Roughly) Calculate Anything
Published on 1. April 2021
Book
Paperback/Softback
208 pages
978-0-00-844449-5 (ISBN)
Description
'Another terrific book by Rob Eastaway' SIMON SINGH
'A delightfully accessible guide to how to play with numbers' HANNAH FRY
How many cats are there in the world?
What's the chance of winning the lottery twice?
And just how long does it take to count to a million?
Learn how to tackle tricky maths problems with nothing but the back of an envelope, a pencil and some good old-fashioned brain power.
Join 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, Maths on the Back of an Envelope 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.
'A delightfully accessible guide to how to play with numbers' HANNAH FRY
How many cats are there in the world?
What's the chance of winning the lottery twice?
And just how long does it take to count to a million?
Learn how to tackle tricky maths problems with nothing but the back of an envelope, a pencil and some good old-fashioned brain power.
Join 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, Maths on the Back of an Envelope 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.
Reviews / Votes
'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
'A joyful primer about the lost art of calculating without a calculator' - Guardian
More details
Language
English
Place of publication
London
United Kingdom
Publishing group
HarperCollins Publishers
Product notice
Unsewn / adhesive bound
Paperback (UK-B)
Dimensions
Height: 195 mm
Width: 127 mm
Thickness: 14 mm
Weight
154 gr
ISBN-13
978-0-00-844449-5 (9780008444495)
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.
Schweitzer Classification
Other editions
Additional editions
E-Book
09/2019
1st Edition
HarperCollins
€7.79
Available for download
Person
Rob Eastaway has written or co-written twelve books, including the bestselling Why Do Buses Come in Threes? and Maths for Mums and Dads as well as What Is a Googly?, the acclaimed beginner's guide to cricket. He is the Director of Maths Inspiration, a national programme of theatre-based lecture shows 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.
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.