Maths isn't just about sums and calculations, number can take you anywhere. With Think of a Number you'll explore a fantastic world of wonder that is full of surprises. Join Johnny Ball on a dazzling adventure to infinity and beyond -crack codes, unravel mazes and discover why finding a prime number could make you a millionaire. Test your friends with magic tricks and mind-reading techniques and find out about the simple puzzles that stumped the world's brainiest mathematicians for centuries. Think maths is boring? Think again!