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Lemonade (Posted on 2005-07-26) Difficulty: 3 of 5
You have 3 unmarked pitchers that hold 6 cups, 10 cups, and 15 cups. The 10 cup pitcher is filled with lemonade, but you have to dilute it so people at the party don't complain that it's too sour. Unfortunately, I have, in the name of logic, broken your only measuring cup.

How can you dilute the lemonade to 20 cups such that all of the lemonade is of equal concentration? You have a sink with unlimited water, but you can't waste any lemonade. Try using as few moves as possible.

See The Solution Submitted by Tristan    
Rating: 3.4000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: solution (I think it's the most efficient) | Comment 16 of 18 |
(In reply to solution (I think it's the most efficient) by Libby)

Problem is, though, the 15 cup pitcher will have 8.333 cups water to 6.666 cups concentrate, while the 6 cup pitcher will have 2 cups water to 4 cups concentrate. The lemonade will be uneven.
  Posted by thegnome54 on 2006-01-29 22:27:12

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