Question

seven members of the board of management of a company had their meeting on a saturday morning.on entering the board room,they greeted each other by shaking hands.everyone shook hand with every other members.in other words all of them shook hands with one another once.how many handshakes took place in that room?

Answer 1

Answer:

May be 21 times

Answer 2

there is seven members

so 1 member shake the hand with 6 members .
so 7 members shake the hands with 7 × 6 = 42

so 42 times handshakes took place in that room.