## 19

**John Henstridge**and

**Jodie Thompson**tell

*Plus*about life as consultant statisticians, modelling real-world problems in areas as diverse as the shipping industry and water rationing.

**Paulus Gerdes**takes us on a tour of the mathematical properties of some beautiful designs inspired by the traditional art of Angolan tribespeople.

**C. J. Sangwin**shows us how eighteenth-century mathematician Leonhard Euler solved one of the foremost infinite series problems of his day.

**John Watling**and

**Allen Thomas**talk to

*Plus*about the vital role of maths in presenting criminal evidence.