There are three colored boxes: Red, Green, and Blue. Exactly one box contains a prize. The Red box states: 'The prize is in here.' The Green box states: 'The prize is not in the Red box.' The Blue box states: 'The prize is not in here.' If exactly ONE statement is true, which box contains the prize?
The Blue box
Test each scenario: 1) If prize is in Red: Red=True, Green=False, Blue=True (2 Trues). 2) If prize is in Green: Red=False, Green=True, Blue=True (2 Trues). 3) If prize is in Blue: Red=False, Green=True, Blue=False (1 True). Since exactly one statement must be true, the prize must be in the Blue box.
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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