photo credit Nasa / Goddard Space Flight Center / Reto Stöckli Problem #2 Handshake Problem Problem There are 15 people at a party who each shook hands with the other people at the party one time. How many handshakes would occur? Find a pattern so that you could figure out the number of handshakes that occur if n people were at the party.

The solution to this problem is to see the amount of people at the party and then subtract that number by one. So far you got the number n-1 and n. So the problem would be 14n(when n equals 15). The next part would be to divide this problem by 2. There will be one guy starting the hand shakes. Once that guy shakes with 14 other people, the next person would shake one less person so 13 and the next and so on. Explanation in Words The equation to this specific problem would be 14n divided by 2. If there were other numbers, than the equation would be (n-1) x (n) divided by 2. Numbers By looking at this picture u could see how the equation fits. Picture Explanation Mahalo for viewing this presentation. Mahalo

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# Handshake Problem

Solution to Project #2