When my father was 31 I was 8. Now he is twice as old as me. How old am I?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

How can you take 2 from 5 and leave 4?

What is the coolest letter in the alphabet?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

By using 'because' continuously three times, can you make an English statement ?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?