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Monthly Archives: May 2011
6 persons inside an elevator – the math
Prove that if 6 persons are inside an elevator then there is a subgroup of 3 persons that know each other or a subgroup of 3 persons that don’t know each other. Note: for this problem if A knows B then … Continue reading
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6 persons inside an elevator – algorithm
Prove that if 6 persons are inside an elevator then there is a subgroup of 3 persons that know each other or a subgroup of 3 persons that don’t know each other. Note: if A knows B then B also knows … Continue reading