Mensa's Most Difficult Maths Tests

This book consists of 200 difficult puzzles of a variety of different types focussing on maths and numerical reasoning. Questions include mathematical grid puzzles such as killer Sudoku and numerical crosswords, as well as maths-based logic and pattern puzzles. Puzzle artworks and full-colour illustrations are included throughout.

Dr Gareth Moore is the author of over 250 bestselling international puzzle and brain-training titles from a wide range of publishers. His books are available in over 40 countries, with worldwide sales of over 5 million copies. His puzzles also appear in magazines and newspapers, and can be played online at the PuzzleMix website. He is also the creator of Brained Up, a cutting-edge brain training site that offers daily sessions to help you make the most of your brain, and is a director of the UK Puzzle Association as well as a former board member of the World Puzzle Federation. He works with a co-writer, Laura Jayne Ayres, on his murder mystery-themed puzzle books.