Product Description: Designed by three puzzle-book pros and long-time Mensa workers, this mind-twisting book is jam packed with almost 100 pages of puzzles--from number stumpers and visual teasers to verbal tests. Kids will find themselves stuck, stumped, and thoroughly challenged as they flex their brain muscles...read more

Presents increasingly difficult number puzzles to solve, such as magic squares and grid problems.

Provides more than two hundred word puzzles, including grid problems, anagrams, logic problems, and word ladders.

Product Description: Some of Mensa's best math brains have set this range of fiendish number questions of all shapes and sizes for every level of ability.

Product Description: This book consists of a series of fun IQ tests, starting at a normal level and progressing through to an advanced stage.

Provides a graded selection of mathematical puzzles, from 'Easy Does It' to 'Super Genius'

Product Description: A group of fun and very challenging number puzzles to test one's abilities with solving math and logic problems.

Offers a variety of number games, including logic problems

Offers a variety of word puzzles, including anagrams and logic problems

Lists thirty-three programs that involve mathematical puzzles, logic problems, anagrams, word games, mazes, card games, and codes