12 coins problem
Library Home || Full Table of Contents || Suggest a Link || Library Help
|A classic math puzzle: given a balance scale and 12 coins, one of which is counterfeit and weighs less or more than the other coins, determine the counterfeit in 3 weightings, and tell if it is heavier or lighter. Extensions to other cases and the general form of the problem. Alternative solutions by Tom Maglierygry, Martin Gardner, Frank Cole, and Barry Wolk; and some variations that were posted to rec.puzzles.|
|Levels:||High School (9-12), College|
|Resource Types:||Problems/Puzzles, Articles|
|Math Topics:||Discrete Math, Algorithms|
© 1994-2014 Drexel University. All rights reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.