Three boxes are labeled 'Apples', 'Oranges', and 'Mixed'. Every single label is known to be incorrect. Without looking inside, you are allowed to reach into just one box and draw out a single piece of fruit. Which box must you choose from to correctly relabel all three boxes?
The box labeled 'Mixed'.
Because every label is wrong, the box labeled 'Mixed' cannot contain a mixture—it contains only apples or only oranges. If you draw an apple, that box is 'Apples'. The box labeled 'Oranges' cannot be oranges, so it must be 'Mixed', leaving 'Apples' to be 'Oranges'.
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: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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