Three colored boxes (Red, Green, Blue) sit on a table. One contains a prize. Red box says: 'The prize is in this box.' Green box says: 'The prize is not in this box.' Blue box says: 'The prize is not in the Red box.' If ONLY ONE statement is true, which box contains the prize?
Green box
If the prize is in the Green box, the Red statement is false, the Green statement is false ('not in this box' is untrue), and the Blue statement is true ('not in Red'). This results in exactly one true statement.
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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