Why is it very easy to weigh a fish?

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

What begins with T, ends with T, and has T in it?

What can you hold in your right hand, but never in your left hand?

Buy me, smell me or deliver me, I do not change.

Who am I?

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?

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?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Prove that the below maths equation is true.

8 + 8 = 91