Problem #79: Boxed In
Three boxes contain two coins each. One contains two nickels,
one contains two dimes, and one contains a dime and a nickel.
All three boxes are mislabeled.
(Each contains the label of one of the other two boxes.)
If you are permitted to take out only one coin at a time, how many must you
take out in order to be able to label all three boxes correctly?
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