SOLUTION: At the conference , people shakes hand to each other once. If 220 hand shakes are made, how many people are there in the room.

Question 1118809: At the conference , people shakes hand to each other once. If 220 hand shakes are made, how many people are there in the room.
Answer by ikleyn(52792) (Show Source): You can put this solution on YOUR website!
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At the conference , people shakes hand to each other once. If 220 hand shakes are made, how many people are there in the room.
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Your input data (220 hand shakes) is wrong.

It is self-contradictory and describes an IMPOSSIBLE situation which NEVER may happen.

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