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

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Look at the picture and find out which square is not linked with any of the other squares.

By moving just one matchstick, you need to make the below statement true. Can you do it?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

What is the last thing you take off before bed?

What type of tree can I carry in my hand?