Three identical boxes contain fruit. One has only apples, one has only oranges, and one has both. Every single box is labeled incorrectly. If you are allowed to pull just one piece of fruit from a single box, which box must you pick from to fix all the labels?
The box labeled 'Both'
Because the 'Both' label is wrong, that box must contain only apples or only oranges. Pulling one fruit tells you definitively what is inside. Once you know that, the other boxes' contents can be deduced easily.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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