If you relish a serious mental workout, this collection of 100 brain teasers will demand your very best lateral thinking skills and mathematical rigour to solve. These puzzles will amuse and perplex in equal measure. But do not worry, full, detailed solutions are found at the back of the book so you can get into the head of these fiendish setters! These mental puzzles require serious application, imagination and skill to solve. Some demand a logical approach, others a methodical, mathematical mind. Are you up to the challenge of solving these rigorous but...

Challenge your brain with these enjoyable puzzles. A jumbo crossword puzzle and general knowledge workout to test and stimulate the brain cells with 50 large grid puzzles from The Sunday Times. These puzzles use a 21 x 21 jumbo-size grid, and appeared in the pages of the Sunday Times, they offer an entertaining and stimulating challenge to all crossword lovers and anyone interested in quizzes, trivia and testing their all-round knowledge. Contains more general knowledge clues then the standard Times Jumbo crossword, for example names of famous people, titles...