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Classic counterfeit coin problem (Posted on 2005-06-04) Difficulty: 3 of 5
In the famous "The Odd Coin" problem you are given twelve coins, exactly one of which is lighter or heavier than the other coins. You are to determine the counterfeit coin, and whether it is lighter or heavier than the other coins, in just three weighings with a balance.

Can you solve this problem with the additional restriction that you must decide what coins go on each pan for all three weighings before any weighing takes place?

See The Solution Submitted by McWorter    
Rating: 3.7500 (4 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(6): Another way to answer itMcWorter2005-06-10 22:10:56
re(5): Another way to answer itKen Haley2005-06-10 04:39:39
re(4): Another way to answer itMcWorter2005-06-07 15:45:50
re(3): Another way to answer itKen Haley2005-06-07 06:08:50
re(2): Another way to answer itMcWorter2005-06-05 22:35:18
re: Another way to answer itCharlie2005-06-05 17:43:52
Another way to answer itJennifer2005-06-05 11:36:10
re(2): AnswerKen Haley2005-06-04 23:07:43
re: AnswerTristan2005-06-04 23:04:11
re(2): No SubjectTomM2005-06-04 16:49:51
re: No SubjectSam2005-06-04 16:29:40
No Subjectjasper2005-06-04 16:08:16
SolutionAnswerKen Haley2005-06-04 16:01:20
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