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Hummer's Mind Reader

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Visit this site: http://www.cut-the-knot.org/Curriculum/Magic/MindReader.shtml

Author:Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Description: Java simulation of a magic trick invented in the 1950s by the magician Bob Hummer. Choose one of three coins. Swap the other two, then swap as many pairs as you like. When you're done, the computer will announce your selection. The explanation includes a "finger mnemonic" for use off the computer.

Levels: Middle School (6-8), High School (9-12), College
Languages: English
Resource Types: Simulations, Fun for Kids, Web Interactive/Java
Math Topics: Permutations/Combinations

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