Question

at end of a business conference .. u and everyone have to shake hands with every alternate person , how many handshakes were done in total if there were 54 people

Answer 1

Answer:

1026

You know that the total number of persons is 54 , so every person shakes hands with 19 persons.. It then mean that, there are 54×19=1026 handshakes. But by every handshake two persons are involved. Therefore, 1026 is the result of double-counting, which gives 513

handshakes.