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|Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny|
|Think of a number and answer a few questions posed by the computer. After a while the compter will announce your number. The trick is based on a special card design whose variations appeared more than a hundred years ago.|
|Levels:||Elementary, Middle School (6-8), High School (9-12)|
|Resource Types:||Games, Fun for Kids, Web Interactive/Java|
|Math Topics:||Number Sense/About Numbers, Patterns/Relationships|
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