Three cornucopias are filled with autumn produce. One has apples, one has pears, and one has grapes. Each has a label, but all three labels are completely wrong. - The label on the first cornucopia says 'Apples'. - The label on the second says 'Grapes'. - The label on the third says 'Pears'. If you reach into the cornucopia labeled 'Grapes' and pull out an apple, what fruit is actually inside the cornucopia labeled 'Pears'?
Grapes
The 'Grapes' cornucopia contains apples. Since all labels are wrong, the 'Grapes' label cannot mean grapes, and since it has apples, it doesn't have pears either. The cornucopia labeled 'Apples' cannot contain apples. Since apples are in the 'Grapes' box, the 'Apples' box must contain either grapes or pears. But wait, let's trace: Box labels: [Apples], [Grapes], [Pears]. Contents: We know [Grapes] has Apples. The remaining contents are Grapes and Pears. The box labeled 'Apples' cannot have apples, so it must have Grapes or Pears. The box labeled 'Pears' cannot have pears. Since [Apples] has Grapes or Pears, and [Pears] cannot have pears, [Apples] must contain Pears! That leaves Grapes for the box labeled 'Pears'.
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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