The idea of this book is to help build confidence with maths via a series of tests and puzzles. After a gentle 'warm-up' 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 'warm-up' section, there are puzzles and tests on 'lateral thinking', 'fun with numbers', 'logic puzzles', 'geometrical puzzles' and 'difficult puzzles'. Readers will soon become familiar and comfortable with a range of tricks and tests, from magic number squares to Fibonacci numbers.
Definition of a pillow problem: A problem you can do in you head without too much trouble, if you look at it in the right way. An interesting problem to think about while you are going to sleep, whether you solve it or not! This is one of the best collection of "pillow problems" I've ever found. Consider "Problem 35." Find the lowest number that has a remainder of 1 when divided by 2, 2 when divided by 3, 3 when divided by 4, 4 when divided by 5, and 5 when divided by 6. What a wonderful way to exercise your mind while you are going to sleep!
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