How can you make number one disappear by adding something to it?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

If your uncle’s sister is not your aunt, what relation is she to you?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Which of the below owl is odd one out?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Decode this picture on T-Shirt and tell what it says ?

In the picture given below, can you find out which digit will take place of the question mark?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?