$22.14
  • RRP: $24.99 Details

    Recommended Retail Price (RRP)

    The RRP displayed is the most recent manufacturer’s recommended retail price made available to Amazon AU.
  • You Save: $2.85 (11%)
Only 5 left in stock (more on the way).
Ships from and sold by Amazon AU.
<Embed>
Other Sellers on Amazon
$21.46
+ FREE Delivery
Sold by: Book Depository UK
$22.12
+ $3.00 delivery
Sold by: Rarewaves UK
$19.50
+ $5.63 delivery
Sold by: SuperBookDealsAU
Flip to back Flip to front
Listen Playing... Paused   You're listening to a sample of the Audible audio edition.
Learn more

Follow the Author

Something went wrong. Please try your request again later.


Maths on the Back of An Envelope: Clever Ways to (Roughly) Calculate Anything Hardcover – 3 September 2019

4.5 out of 5 stars 322 ratings

See all formats and editions Hide other formats and editions
Amazon Price
New from Used from
Kindle
Hardcover
$22.14
$19.48
FREE delivery: Thursday, 11 March on first order.
Fastest delivery: Wednesday, 10 March
Order within 19 hrs and 4 mins

Save on selected Penguin Classics and Popular Penguin books.
View our selection and latest deals. Click to explore.
click to open popover

Special offers and product promotions

  • Buy this item and get 90 days Free Amazon Music Unlimited. After purchase you will receive an email with further information. Offer valid for a limited time only. Terms and Conditions apply.” Learn more here.

Frequently bought together

  • Maths on the Back of An Envelope: Clever Ways to (Roughly) Calculate Anything
  • +
  • Humble Pi: A Comedy of Maths Errors
  • +
  • Things To Make And Do In The Fourth Dimension
Total Price: $64.10
Buy the selected items together

Save up to 50% off RRP on select top books
PLUS, free expedited delivery. T&C's apply. See more

Product details

  • Publisher : HarperCollins GB (3 September 2019)
  • Language : English
  • Hardcover : 208 pages
  • ISBN-10 : 0008324581
  • ISBN-13 : 978-0008324582
  • Dimensions : 13.5 x 2.1 x 20.4 cm
  • Customer Reviews:
    4.5 out of 5 stars 322 ratings

Product description

Review

‘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

About the Author

Rob Eastaway is a writer, speaker and consultant. His books include the bestselling What is a Googly? (9781861056290) and Why Do Buses Come In Threes? (9781861058621). He jointly devised the system now used to officially rank international cricketers and lives in London, where he is a keen weekend cricketer and occasional golfer.

From the Publisher

Customer reviews

4.5 out of 5 stars
4.5 out of 5
322 global ratings
How are ratings calculated?

Review this product

Share your thoughts with other customers

Top reviews from Australia

There are 0 reviews and 2 ratings from Australia

Top reviews from other countries

Dr Dombo
4.0 out of 5 stars If you're going to be pedantic at least have someone proofread your book...
Reviewed in the United Kingdom on 25 November 2019
Verified Purchase
134 people found this helpful
Report abuse
Mark Holland
5.0 out of 5 stars Maths lesson materials.
Reviewed in the United Kingdom on 22 September 2019
Verified Purchase
18 people found this helpful
Report abuse
Mr. K. A. Harrison
5.0 out of 5 stars As I am always saying
Reviewed in the United Kingdom on 30 October 2019
Verified Purchase
11 people found this helpful
Report abuse
Sherlock
5.0 out of 5 stars This Book Will Sell Well in my Estimation.
Reviewed in the United Kingdom on 23 September 2019
Verified Purchase
9 people found this helpful
Report abuse
M. Nicholls
5.0 out of 5 stars Read it and share it with your kids.
Reviewed in the United Kingdom on 16 November 2019
Verified Purchase
8 people found this helpful
Report abuse