Download Classic Brainteasers by Martin Gardner PDF

By Martin Gardner

"Gr.4-6. From math, technological know-how, and good judgment puzzlers to notice video games to what's-wrong-with-this-picture demanding situations. caricature illustrations supply the booklet pick-me-up attraction, yet it is the video games themselves that might maintain readers going as they fit wits with Gardner, problem their associates, or just learn alongside and lookup the solutions within the back."-- "Booklist

. ninety six pages, fifty one b/w illus., five 3/8 x eight 1/4.

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Extra info for Classic Brainteasers

Sample text

Put it on the cop's picture. He is rushing out of the police station to catch the robber. One player moves the smaller coin and the other moves the larger one. Here are the simple rules: 1. The policeman always moves first. After that, players move in turns. 2. Each move is one block only, in any direction. 3. The policeman tries to catch the thief. This is accomplished by moving the smaller coin so that it lands on top of the larger one. 4. The thief tries to keep from getting caught. If he isn't captured in 50 of the policeman's moves, then he wins.

What made the policeman so sure? Answer on page 86. 45 The Amazing Computer A store has on sale a computer and word processor small enough to fit in your pocket. It can add, multiply, subtract, divide, and write in all languages. A delete device will correct any error. No electricity is required to operate it. The price? Only a few cents! How can the store make a profit by selling it so cheap? Answer on page 87. " This seems impossible. Can you explain? Answer on page 87. Mrs. Perkins' Pets All of Mrs.

First see if you can find it. Then check your guess with the answer on page 88. 53 Pepper or Salt? This is Professor Piffle's latest invention—an automatic salt-and-pepper shaker. As you can imagine, he's very proud of it and uses it all the time to give his food flavor. Right now he's about to use it on one of his favorite dishes—hot soup. If he turns the crank in the direction of the arrow, will this amazing machine shake salt or pepper in his bowl of soup? Answer on page 88. 54 K n O t S OF N 0 t ?

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