This puzzle book tests and increases your deductive skills figuring out the Frame Games, puzzles that ask you to count lots of trangles inside a larger one, and other types of visual-letter-number mind-benders.

Brainiacs on the prowl for challenging fun will find everything they're looking for in these cunning conundrums. Puzzle master Terry Stickels has created a mind-melting collection filled with hundreds of diverse and fiendishly tricky problems--including wordplay, math, analytic reasoning, logic, visual dilemmas, and code breaking. Figure out the next number in a series, find hidden phrases, and determine what a three-dimensional object would look like from two-dimensional drawings. Every puzzle provides a workout that strengthens mental muscles. And while these brainteasers do require concentration, they don't demand any special training or high-level math skills. A little practice, patience, and imagination are all it takes.

Created by two pioneering puzzle makers, these 50 labyrinths of mesmerizing designs will challenge maze enthusiasts of all ages. The imaginative, eye-popping patterns in these creative puzzles will both delight and baffle maze maniacs while expanding their creative thinking skills.

Here are over 300 tantalizing puzzles, brain teasers and riddles by one of the greatest mathematical geniuses of the twentieth century, Shakuntala Devi, popularly known as the 'human computer'. The puzzles include every possible type of mathematical recreation, time and distance problems, age and money riddles, puzzles involving geometry and elementary algebra, and just plain straight thinking. Often entertaining, but always stimulating, the puzzles included in the book offer hours of fun and relaxation.

A collection of brain teasers, puzzles, optical illusions, IQ tests, trivia challenges, and math tests designed to help people improve their brain power.

Part of a fun range of pocket-sized puzzle books for adults, this book was published following the phenomenal success of "Mind-Bending Lateral Thinking Puzzles." Cast logic to the wind and let yourself be pleasantly perplexed by this second volume of lateral thinking puzzles, which are guaranteed to test and tease the old grey matter!