Here are enough tough puzzles to test your mental powers for hours and hours. Try this never-ending array of puzzles, challenges, funky facts, things to build, weird riddles, and other conundrums. Some are old favorites that never fail to stump, others are totally new, but all promise hours of fun. Every one can be completed with a pencil, pen, or some inexpensive materials around the house. 96 pages, 105 b/w illus., 5 3/8 x 8 1/4.

Can you imagine the mirror image of a given object, or the best way to connect a series of geometrical shapes? These tricky puzzlers will test your ability to do these things and more . . . and help you develop valuable mental skills. All the answers appear in the back.

"A man writes the same number, and nothing else, on 20 sheets of paper. Why?" "A man went around the world in a ship. Yet he was always in sight of land. How come?" These are examples of lateral thinking puzzles. You're given a statement about a situation that you have to use as a starting point to arrive at a particular explanation or solution. Often there can be many possible scenarios to explain the puzzle, but the challenge is that you have to find the "right" answer. Typically the puzzles contain insufficient information for you to immediately figure out the solution (clues are provided). When you get stuck, attack the problem from a new direction--think laterally! Not only are these puzzles fun, they also help to develop skills in questioning, deduction, logic, and, of course, lateral thinking. Answers: It's January and he is writing the date of the year on all the checks in his checkbook to avoid putting last year's date by mistake; He was an astronaut in a space ship. 96 pages, 25 b/w illus., 5 3/8 x 8 1/4.

Eighty puzzles. The answers are easy! But getting there is the hard part. Uncover connections and identify hidden relationships until suddenly the answers are appearing as if by magic. Solve situations on the moon, around an insect-eating plant and gold-record racing through space in the Voyager spacecraft. 96 pages, 100 b/w illus., 5 3/8 x 8 1/4.

Finish layouts, do tricky calculations, and solve the complex mysteries of visual designs. Take a scissors and try to duplicate a "mind-bending" curved design with just a few snips. For a change of pace, find the identity of 30 coins that equal $1.00. (25 pennies, 1 nickel, 2 dimes and 2 quarters.) Answers are in the back--in case you're tearing your hair out in frustration!

What a bargain! At more than 700 puzzle-packed pages, this huge, value-priced collection should keep any solver happy...and busy for a very long time. It contains brain-busting challenges of almost every type: math logic problems for the numerically inclined; absolutely amazing lateral thinking conundrums; really great critical thinking bafflers; and mind-boggling word puzzles. Here's just a small sample of what's inside: The 22nd and 24th presidents of the United States had the same mother and the same father, but were not brothers. How could this be so? Stumped? That's because it's one man--Grover Cleveland--who was reelected after skipping a term. And that's just an easy warm-up!