What is so fragile that saying its name breaks it?

When it is alive we sing, when it is dead we clap our hands. What is it?

A father's child, a mother's child, yet no one's son.

Who am I?

What has hands, but can’t clap?

Replace the question mark with the number below given a simple math problem.

Find the next number in the sequence

1, 2, 6, 21, 88, __?

A bomb exploded in a room full of married couples and no one died. How?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?