Acknowledgements

SHL Group Ltd is a company that develops and publishes an extensive range of psychometric tests and they have kindly provided some verbal, numerical and diagrammatic sample test material, which can be found in Part 2 of this book. These are © SHL Group Ltd.

David Singmaster is a professor of mathematics and a metagrobologist with much experience of setting mathematical brain teasers and he has kindly provided some challenging and entertaining problems, which can also be found in Part 2 of this book.

I would also like to thank Helen Baron, Malcolm Bray, Andrew Chapman, Trish Cross, John Dean, John Hacksman, Margaret Holbrough, Stuart Neath, Gary Pyke, Elaine Quigley, Barbara Reik and David Thompson.