Three boxes are labeled 'Apples', 'Oranges', and 'Apples and Oranges', but every single label is guaranteed to be incorrect. You are allowed to pull out exactly one piece of fruit from only one box of your choice to fix all the labels. Which box must you draw from?
The box labeled 'Apples and Oranges'
Since all labels are wrong, the box labeled 'Apples and Oranges' cannot contain both fruits; it must contain exclusively apples or exclusively oranges. If you draw one fruit from it (say, an apple), you instantly know this box contains only apples. Because the original label said 'Apples and Oranges', and the box next to it is labeled 'Oranges', the 'Oranges' box cannot be oranges (since labels are wrong) and cannot be apples (since you just found apples). Thus, the 'Oranges' box must hold 'Apples and Oranges', leaving the remaining box to be 'Oranges'. Drawing from any other box gives ambiguous information.
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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