The Most Difficult Math Tests: Prove your arithmetic prowess by solving these tough numerical puzzles

The Most Difficult Math Tests provides an exceptional challenge for even the most adept of puzzlers.

All aspects of arithmetical thinking are tested by the world's finest puzzle-setters. With puzzles ranging from killer Sudoku to numerical crosswords, this colourful puzzle book will keep you entertained for hours.

Dr Gareth Moore is one of the world's leading puzzle-setters, with more than 750,000 book sales to his name. He is the author of more than 75 international brain-training titles including the best-selling puzzle book The Ordnance Survey Puzzle Book, which has sold more than 120,000 copies in the UK. He is also the creator of Brained Up, a cutting-edge brain training site offering scientifically designed daily sessions to help you make the most of your brain.