A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

How many triangles are there on the puzzle below?

Can you tell a 3D object that has just two surfaces?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Find the missing letter in the last circle logically in the given below picture.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Spot what is wrong here in below Picture?