Why Do Buses Come in Threes?

The two messages of this book are that mathematics is important to everyday life, and that it’s fun. Like the earlier books of Martin Gardener, this book aims to make mathematics relevant and accessible, but with a British rather than American slant.

Have you ever wondered why flowers often have five petals, how bookies’ odds work, how you always end up in the slowest queue, or, indeed, why buses come in threes? If so, then this is the book for you.

In the course of a humorous, chatty discourse on the mysteries of life the authors introduce a number of branches of mathematics, including probability, topology, statistics and queuing theory, to name just a few.

To aid casual readers or those who’ve previously found the subject forbidding the maths is kept at a fairly simple level. However there’s still enough detail to be useful in other applications. I used this book as a reminder when trying to solve a problem related to software performance, and others who don’t exercise their maths every day might also find it a useful memory jogger.

Whether as an introduction if you’ve never enjoyed maths before, or a reminder if you have, I thoroughly recommend this book. I can also recommend the companion volume “How Long is a Piece of String?”