A series of logic puzzles designed by some of Mensa's leading puzzlesetters which will help boost brain activity and improve concentrationand memory - while providing hours of puzzling entertainment. Withover 200 logical challenges to test your aptitude for deduction and toget your brain in gear.

"These visually unique braintwisters will put your puzzle-solving abilities to the ultimate test!"--Page 4 of cover.

It's not elementary, but you will need Holmes's famed powers of deduction to solve these crafty puzzles. Here's how it goes: at the end of each condundrum, you'll find at least one condition - and sometimes more - that the solution must meet.

Give your brain a workout on the type of brainteasers that challenge the best solvers at the World Puzzle Championships. They're tough, but fun, and the feeling of satisfaction you get when you succeed is simply unbeatable. Some of the puzzles are oldies but goodies, like battleships--and its many variants--where you search for a fleet hidden within a grid. In "Eminent Domain," try to determine which blanks cells are owned by the numbered ones. For "Hex Loops," locate a path that travels through adjacent hexagons: the trick is, it has to end where it started, and the lines can't touch or cross. From Snaky Tiles to Spiral Galaxies, these Mensa-level conundrums will get your mind in shape.

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.

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

Don't think too hard or you'll never solve these logic puzzles and riddles. The answers to all 187 are easy once you catch the tricky wording. How can you tie a knot in a napkin by holding one end in each hand without letting go of it? Impossible, you say (or your friends will say, if you bet them). But: Cross your arms and hold a tip of the napkin in each hand. When you uncross your arms, the knot will be formed! Now try this riddle: I climbed up a cherry tree, where I found cherries. I did not pick cherries, nor did I leave cherries. How can you explain this? Answer: I climbed up a cherry tree with two cherries in my hand. I picked only one. I left the other one on the tree. I did not "pick cherries," because I "picked a cherry." Take this dare: My bird can fly faster than any supersonic plane. Here's how: If you put my bird inside any plane and make it fly in the same direction as the plane, it will go faster than the plane. 96 pages, 52 b/w illus., 5 3/8 x 8 1/4.