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The internet is truly puzzled by this homework question
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Could you pass this interview? The famous batteries and flashlight logic puzzle
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6 Impossible Puzzles With Surprising Solutions
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Singapore test question that left students crying
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Very few people can solve. Which martini glass is closest to 1/2 full?
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Popular Science's "Unsolved" Car Puzzle
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Is 1/4 of the circle shaded? Most students get this wrong
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