Three boxes are labeled 'Apples', 'Oranges', and 'Apples and Oranges'. All three labels are guaranteed to be incorrect. You are allowed to pull only one piece of fruit from the box labeled 'Apples and Oranges'. Which box must you draw from to determine the correct contents of all three boxes?
The box labeled 'Apples and Oranges'.
Since every label is wrong, the box labeled 'Apples and Oranges' must contain either only apples or only oranges. Drawing one fruit tells you its true contents. Knowing that, you can deduce the rest.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Hard. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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