Question

Jack and his partner went to a party where four other couples were present. Every person shook hands with everyone else (other than their own partner). When the handshaking was over, Jack wanted to know how many handshakes took place. When he asked around, Jack got nine different answers.
How many handshakes took place?
(Please help asap this is so hard )

Answer 1

Answer:

which person shake 5 times which mean 25 times