Once upon a time, a king called for his 7 wisest men to be assembled in a room, with no one but them. All 7 men came in and shook their hands once with each of them.
How many total handshakes were there?
21
Once upon a time, a king called for his 7 wisest men to be assembled in a room, with no one but them. All 7 men came in and shook their hands once with each of them.
How many total handshakes were there?
21
