What could be more appealing to Mensa members--or anyone who enjoys a good challenge--than a cunning test of intelligence and logic? That's exactly what these 250 puzzles provide. The trick to kakuro is in making it all add up: the game begins with a grid that looks like a crossword, except that some squares contain small numbers in the corner. Fill in all the empty boxes using the numbers 1 to 9 without repeats so that the sum of each horizontal set of digits equals the number in the black triangle to its left, and the sum of each vertical set of digits equals the number in the triangle above it. The kakuro puzzles start out simple...and get more difficult as the book progresses.

How well do you think logically? Find out with these puzzles. But don't forget the degree of difficulty increases as you go.

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

Take the Mensa challenge! These extraordinarily entertaining puzzles can confound even those with high IQs-and that's what makes them such delightfully tricky fun. A few can be solved relatively quickly, but the hardest may seem nearly impossible to crack. Give your skills a real workout on numerical conundrums, word games, lateral thinking problems, and riddles. Brainteasers, arranged in order of difficulty, train the mind and provide a good time all at once. The most complex bafflers include chess, logic, and spatial puzzles. Here's a small sampler of what's inside! � A farmer has twenty sheep, ten pigs, and ten cows. If we call the pigs cows, how many cows will he have? � Which three boys' names are anagrams of one another? Answers: 1. Ten cows. We can call the pigs cows, but that doesn't make them cows. 2. Arnold, Roland, and Ronald.

Brain Training is an easy-to-digest collection of puzzles and tips to help exercise the brain and keep the cognitive faculties razor-sharp. Brain Training covers key areas of brain function, including memory, perception, problem-solving, verbal reasoning, and the body (how diet, exercise, meditation and other physical and mental fillips can raise brainpower). Each chapter then concentrates on a specific brain function, beginning with a lively explanation of how it works and then offers the most effective prescriptions available to exercise that particular mental function. For those who are struggling with memory, those having trouble learning new things, or those facing the pressures of exams - in fact, by anyone who wishes to maximize their cognitive potential - Brain Training is an indispensable resource to get the flabbiest brain fighting fit once again.