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The 5 cards Magic trick Rechallenges! (Posted on 2009-06-01) Difficulty: 4 of 5
In an attempt to solve this problem you have to read "5 Cards Magic Trick" first.

Then here is the Challenge:

Can the "5 Cards Magic Trick" still be performed under the conditions below?

1. The trick is done with 2 mixed packs of cards (meaning, each card appears twice)

2. When the cards are given to Magician B at least one of them must be face down and he mustn't look at it.

Note: the conditions are simultaneous

No Solution Yet Submitted by Assaf    
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re(2): Corection To The Problem!!! Please Read Comment 4 of 4 |
(In reply to re: Corection To The Problem!!! Please Read by Charlie)

Charlie, I believe that your modification to my solution of the 1 deck trick could work with N decks.  In fact I would say that it makes the trick even easier by adding extra decks and allowing 1 or more to be face down.  If there are 2 or more identical cards among the 5 then simply discard one of the identical cards and place all but its twin face down, that will signal magician B that the face up card is exactly the card that was discarded.  Now if not, then all 5 cards are different and we can use the previous method with the slight modification given by Charlie.
  Posted by Daniel on 2009-06-01 21:58:35

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