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 Magic trick (Posted on 2003-05-08)
We have a normal deck of 52 cards. We want to do the following magic trick:

A person from the audience chooses 5 random cards. The magician's assistant looks at the 5 cards, chooses 4 of them, hands them to the magician one by one face up and keeps the other one hidden. The magician then guesses the fifth card (the one that the assistant kept hidden) just by looking at the 4 cards he was handed in.

Is it possible to devise a strategy, so that no matter what the original 5 cards were, the trick always works?

 See The Solution Submitted by Fernando Rating: 3.8571 (14 votes)

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 Stupid solution Comment 20 of 20 |
Simple. You look at the rest of the deck, thus eliminating all of the cards except for the hidden one. (The rules didn't say I couldn't do that, right?)
 Posted by David on 2004-03-31 17:53:35

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