Mensa's Most Difficult Geometric Puzzles

Graham Jones has been involved with puzzles for his entire professional career, as a creator, editor and checker. For seven years he was the managing editor at Puzzler Media, before retiring to become a freelance puzzle writer.Mensa is the largest and oldest high IQ society in the world. It is a non-profit organization open to people who score at the 98th percentile or higher on a standardized, supervised IQ or other approved intelligence test.

• 200 difficult puzzles of a variety of different types focussing on geometric shapes and mathematics. Questions include area mazes, trigonometry and a variety of puzzles testing your spatial awareness. Puzzle artworks and full-colour illustrations are included throughout.