Please please help me solve this problem!!!?!


Question:

Please please help me solve this problem!!!?

When there were two people, they shook each others hand, so that was 1 handshake. When three people shook hands, there were three handshakes. Suppose that this was a big fundraiser for the Congressmen, and 105 people were there. How many handshakes were there among those 105 people?


Answers:

10920 handshakes
(use a calculator for this)


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