Brush up on your mental arithmetic, including percentages, averages and recurring decimals or work on your trigonometry skills, from Pythagoras Theorem to triangle areas and angles.
I Used To Know That: Maths is a fun and accessible way to re-visit all those useful tips and maths tricks that you have forgotten from your school days.
- Format: Hardback
- Pages: 192 pages, Ill
- Publisher: Michael O'Mara Books Ltd
- Publication Date: 27/05/2010
- ISBN: 9781843174745