TY  - BOOK
AU  - Eastaway, Robert
TI  - Maths on the back of an envelope : : clever ways to (roughly) calculate anything
SN  - 9780008389031 (pbk)
U1  - 510  
PY  - 2019///
CY  - London	
PB  - HarperCollins	
KW  - Mathematics	
KW  - Arithmetic
N1  - https://harpercollins.co.in/product/maths-on-the-back-of-an-envelope
N2  - "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"
ER  -