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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?

See The Solution Submitted by Old Original Oskar!    
Rating: 4.0000 (1 votes)

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re: The answer is ... | Comment 7 of 14 |
(In reply to The answer is ... by Charlie)

I'll agree that it would take 5 weighings if you were to weigh them all seperately, but what if weighing 2 was dependent on the outcome of weighing 1 and weighing 3 was dependent of the previous two? I don't know how you would decide what to weigh next, but I have a feeling that you can solve it in three weighings if you take the previous weighings into account when deciding what to weigh next.
  Posted by Tiralmo on 2005-06-23 23:48:22

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