by Chris Waring (Author)
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: Hardcover
Pages: 192
Publisher: Michael O'Mara Books Ltd
Published: 27 May 2010
ISBN 10: 184317474X
ISBN 13: 9781843174745