1. Put seventeen toothpicks together to make six squares, like this--- Now, take away four toothpicks so that only four squares are left. (There are a number of ways to do this.) 2. That's pretty...
Rebus riddles
A rebus is a puzzle in which pictures, letters, or numbers stand for words or parts of words. But here's a kind of rebus with a new twist. To work this kind of rebus, you add or subtract letters to...
The wolf, the goat, and the cabbages
> More than a thousand years ago, a man wrote a book of puzzles---the > kind of puzzles we call "brainteasers." Here is one of the puzzles > from that book. See if you can solve it. There was once...
Puzzle fun!
Do you like puzzles and "thinking games"? Well, here are some for you. So on with your thinking cap and see Just how well you are able to do! These pages of games and puzzles Will give you some...
Mathemagic
This book entertains and challenges young readers with sto¬ries, puzzles, games, tricks, and facts about numbers and shapes; how we can play and work with numbers; what num-bers can do for us; careers involving numbers.
Books to Read
If you enjoy learning what makes things work, you will find more books to read. A few of them are listed here. Your school or public library will have many more. Science Magic: Scientific...
An oven that stays cool
Could you bake a potato in an oven that doesn't get hot? Yes, you could, if it's a microwave oven. In minutes, the potato gets steaming hot, but the oven stays cool! And the glass or china dishes you...
An up-down machine
> An elevator car hangs on steel cables inside a shaft. A pulley turns > the cables to make the car slide up or down. Climbing the stairs in a house is easy. But in a tall building with many...
Frozen food
Fresh foods keep their color and flavor for only a short time. You have to eat them soon after they are bought. Is your piece of apple pie homemade, or did it come frozen? Sometimes it's hard to...
Finding moving things
Air traffic controllers use radar to direct planes near busy airports. The moving spots of light on the radar screen show where each plane is. Airplanes get into traffic jams just as cars...