Thursday, January 22, 2009

Mall management.

There is a bunch of security guards in the shopping store. How many guards are there if there is a guard in each of 4 corners, and every guard sees three guards in front of him. (adapted from B.Kordemsky)

1 comment:

Maria said...

Nicolas (from Paris, France) solved this first and will get a prize.

The answer:
There are only four guards, one in each corner.

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