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39 coins (Posted on 2003-04-23) Difficulty: 4 of 5
If you haven't done any of the other coin problems, then you might want to go back and try those now, this one is very difficult, even if you have figured out the other ones.

This time, as the title implies, there are 39 coins, and one is fake. You have a balance scale, which can be used 4 times.

How would you find the fake coin?

See The Solution Submitted by Jonathan Waltz    
Rating: 4.1250 (8 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: General Solution | Comment 6 of 10 |
(In reply to General Solution by Sanjay)

This should be posted for Many Coins--One Fake.
  Posted by Charlie on 2003-05-17 09:25:32

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