Why Aeroplane windows are round?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

What has a bottom at the top?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Below rebus represent famous DiCaprio movie. Can you name it?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What do you get if you add 2 to 100 four times?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.