What is more useful when it is broken?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

What does below chemistry rebus means?

What does this rebus riddle means ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

What number should come in place of the question mark below?