Murderous Maths: Fractions and Averages, Mean and Vulgar by Kjartan Poskitt
Using a host of hilarious characters, Kjartan Poskitt presents all the tricks, tips and shortcuts to statistics they don't teach at school. Readers will find out how fractions can save them from the toxic mutant fish of Fastbuck, what makes Pongo McWhiffy a mathematical freak, and travel to Planet Mean to discover how averages can be absolutely revolting. Guarantee: this book contains absolutely no sums.