A bumper collection of easy, medium and difficult Su Doku puzzles to test your mental dexterity, powers of logic and deduction. 100 easy, 100 medium and 100 hard puzzles. Solutions easily found at the back of the book.
A crossword puzzle workout, to stimulate the brain cells and test your all-round general knowledge with 100 puzzles from The Sunday Times. Of moderate difficulty with one or two more teasing clues to tax the brain more fully.
If you enjoy mathematical and mechanical calculations and appreciate challenges to your lateral thinking and logical reasoning, this is the book for you! Two hundred puzzles include complete solutions.
Math enthusiasts of all ages will delight in these 200 riddles, based on concepts from geometry, trigonometry, algebra, infinity, probability, and logic. Includes complete solutions and 113 illustrations.
These 85 visually stunning and intellectually stimulating challenges abound in fascinating facts and include several classic puzzles attributed to important mathematicians and philosophers, including Galileo, Fibonacci, Foucault, and Aristotle. Solutions.
Thirty fun-filled puzzles that not only offer hours of entertainment, but also help enlarge vocabularies and improve spelling. Diverting brain-teasers cover a wide range of subjects: animals, body parts, cars, food, Christmas, antonyms (words with opposite meanings of other words) and more.