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At a party, everyone shake hands with everybody else. There were 66 handshakes. How many people were at the party?

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by only4u

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by only4u

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There were 12 people in the party.

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1 +2 +3 +4 .........+ 11 = 66

So there were 11 + 1 = 12 people at the party.

So there were 11 + 1 = 12 people at the party.