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Two sets of Coins (Posted on 2005-10-07) Difficulty: 2 of 5
You have two sets of five coins. Each set has four real 30g coins and one 31g fake coin. It is easy to find the fake coins using a balance scale a total of four times, two weighings for each set.

Can you find a strategy which uses only three weighings?

See The Solution Submitted by Brian Smith    
Rating: 3.5000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
not sure i get your logic for scenario two... | Comment 4 of 7 |
If ABC = abc, then next weighing should be D Vs d and following should be E Vs e.  Whats your point??  Sorry, dont I dont get it.
  Posted by Mad on 2005-10-21 00:23:43
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