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Usenet Newsgroups : rec.puzzles Hall of Fame

The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

Many of these puzzles also appear in Braingle's own collection.

Hall of Fame
Categories : logic : wire.labels.p

You are in room A, where you can see the ends of 15 wires, which are
labelled 1,2,.. ,15. In room B, you have the other ends of the wires
and those ends are labelled A,B,...,N,0. You have with you a battery,
a bulb and a lot of small wires. By going to room B, and then back to
room A, can you tell which letter corresponds to which number? Room B
is on a different floor, which can only be accessed using a lift.

What about the general case of n wires? (n > 2).


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