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April 20, 2014

April 20, 2014

Posted by **Nadia** on Thursday, June 5, 2008 at 12:01am.

Hint: There are 30 kids

- Math -
**drwls**, Thursday, June 5, 2008 at 12:34amEach of the 30 students has 29 hands to shake.

30 x 29 / 2 = 435

Dividing by 2 avoids double counting.

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