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Three Tests, Take Three! (Posted on 2005-06-23) Difficulty: 2 of 5
You have nine brass rings, but three are actually gold. Can you pick these out using a balance scale three times at the most?

  Submitted by Old Original Oskar!    
Rating: 4.0000 (1 votes)
Solution: (Hide)
No, you can't. There are 84 ways of picking three rings out of nine. A scale can give three results (left heavier, right heavier, equal) so three times can differentiate among 27 results; it's no good, but 5 times could do.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: One Gold RingTristan2005-07-02 07:17:37
One Gold RingBrian Smith2005-06-27 22:34:17
Try a new Ringbrianjn2005-06-26 04:20:04
re: The answer is ...brianjn2005-06-24 06:35:06
re: Historical answerbrianjn2005-06-24 06:18:48
re(2): The answer is ...Charlie2005-06-24 01:44:35
re: The answer is ...Paul2005-06-24 01:38:26
re: The answer is ...Tiralmo2005-06-23 23:48:22
SolutionHistorical answerCory Taylor2005-06-23 16:23:14
re: The answer is ... Straight from the shoulder!!brianjn2005-06-23 13:45:59
SolutionThe answer is ...Charlie2005-06-23 12:56:03
re(2): Ring Around - but no answer!brianjn2005-06-23 11:47:42
re: Ring Aroundbrianjn2005-06-23 09:51:01
Some ThoughtsRing Aroundbrianjn2005-06-23 08:44:27
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