The idea of this book is to help build confidence with maths via a series of tests and puzzles. After a gentle a warm--upa section, the puzzles and tests get progressively more challenging over the course of the book. There is a hints section for readers who get stuck, as well as a complete set of answers for every test at the back of the book. After the a warm--upa section, there are puzzles and tests on a lateral thinkinga , a fun with numbersa , a logic puzzlesa , a geometrical puzzlesa and a difficult puzzlesa . Readers will soon become familiar and comfortable with a range of tricks and tests, from magic number squares to Fibonacci numbers.