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The triple threat (Posted on 2016-09-13) Difficulty: 3 of 5
You are the magician.

Put three cards face-up on the table. Ask a spectator to choose one mentally and remember its position.

Flip the three cards over. Turn around and instruct the spectator to show the other spectators which card he has chosen, then have him switch the two other cards behind your back.

Now face the table again and instruct the spectators to switch cards as many times as they wish in front of your eyes.

Reveal the card originally chosen by the spectator.

Please explain how does it work.

No Solution Yet Submitted by Ady TZIDON    
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Some Thoughts Marked deck | Comment 1 of 2

The backs of the cards are marked in the usual way.

As the original set-up of the cards is known to the magician, the two switched cards will show movement, implying that the unmoved card is the one chosen by the spectator.

Since the chosen card's identity is already known, further moves by other spectators will make no difference.

  Posted by broll on 2016-09-16 01:34:36
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