In detail

Handshakes

Handshakes

At the end of the last meeting of my company there were 15 handshakes among all attendees.

How many were at the meeting?

Solution

We were 6 people. If each person greeted each of the others there would be 6 * 5 = 30 greetings but since each hand shake is shared by two people we have to divide this amount by two.