A fun and informative book from a leading mathematics educator and demystifierEver wondered why a lift takes so long to respond to a call? Or if there's a mathematical secret to making a hit single? And how long is a piece of string? The answers to these and many other intriguing questions of everyday life are here.How Long is a Piece of String? is the perfect book for anyone who is curious about the way in which math underlies so much in our everyday lives. Whatever your mathematical ability level, you will find this book informative, thought-provoking and, most of all, fun.