Think maths is boring? Think again! Join Johnny Ball on a dazzling adventure to infinity and beyond! Maths isn't just about sums and calculations, numbers can take you anywhere. With Think of a Number you'll explore a fantastic world of wonder that is full of surprises. Let Johnny Ball take you on an incredible fact-packed journey — crack codes, unravel mazes and discover why finding a prime number could make you a millionaire! — Packed with all the fun and humorous facts that other maths books leave out — Crammed with interactive activities including magic tricks and mind reading techniques! — Features puzzles and quizzes that can engage the most reluctant of readers Find out why fleas can jump higher than elephants and investigate the simple puzzles that stumped the world's brainiest mathematicians for centuries! Think of a Number is a maths book unlike any other: instead of calculations and multiplication, this book reveals how weird and wonderful the world of maths can be!