Be a Wizard With Numbers: 101 Ways to Count Yourself Smart by Andrew Jeffrey
Many people are uncomfortable with numbers finding them daunting and difficult. In this book numbers are brought to life at a very practical and fun level so that you can learn a whole range of techniques and shortcuts you never knew existed. Everything is covered - from understanding statistics and the odds gamblers face to the interest rates on your savings and ways to maximise your returns. There are enjoyable puzzles, demonstrations and self-testing interludes, this a book to instruct and give pleasure.