Two magicians A and B perform the following trick:

A leaves the room and B chooses 4 members from the audience at random. Each member chooses a card numbered from 1 to 100 (each chooses a different card) and after B has seen their cards he chooses a card from the remaining deck of cards. The 5 chosen cards are shuffled by an audience member and handed to A who just returned to the room. Prove that A is able to figure out which cards each member picked. Consider that the chosen members form a row and e.g. the leftmost member picks the first card and the rightmost member (B) picks the last card.

Seems that some doable offerings have been made.  Some of those may need closer scrutiny (by the author).

For this to be a staged performance we need to accept the "KISS" principle.  In recall (I haven't reread the comments) there are worthy means to accomplish this at extremes! 

I think that after, 8 months there should be a 'resident' solution on the server at Perplexus, unless of course you are a member o a Magician's guild and have broken ranks; but then, as a Magician yourself, why drag us into the field of Lateral Thinking to which I referred in my prior comment? Oh! and break the "oath of secrecy"?

Posted by brianjn on 2008-01-06 09:16:37