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Can you do better?

Bemusements would like your puzzles and mathematical games (but not Sudoku). Contact [e-mail] to submit yours!

Puzzles:
The Contestant

Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a sports car; behind all of the others are bicycles.

You pick a door, say No. 1, and the host, who knows what’s behind the doors, opens door No. 2, revealing a bicycle. He then says to you, “Do you want to pick door No. 3?” Is it to your advantage to switch your choice?

Source: http://goodriddlesnow.com/riddles/view/98

Find the solution at: http://xrds.acm.org/bemusement/2014.cfm Dress to Repress

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And Suddenly,
She Just Wasn’t There