General Information
 Title:                  Maths on the Back of an Envelope: Clever Ways to (Roughly) Calculate Anything
 Author:                 Rob Eastaway
 Read By:                Rob Eastaway
 Copyright:              2019
 Audiobook Copyright:    2019
 Genre:                  Audiobook
 Publisher:              HarperCollins
 Duration:               3 hours, 36 minutes, 40 seconds
 Chapters:               6

Media Information
 Source Format:          Audible AAX
 Source Sample Rate:     44100 Hz
 Source Channels:        2
 Source Bitrate:         126 kbits

 Lossless Encode:        Yes
 Encoded Codec:          AAC / M4B
 Encoded Sample Rate:    44100 Hz
 Encoded Channels:       2
 Encoded Bitrate:        126 kbits

 Ripper:                 inAudible 1.97

Book Description
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.