Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What always comes into a house through the keyhole?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

What is the difference between a jeweller and a jailer?

What is both possible and impossible at the same time?

Find the last number in the series below:

voN luJ yaM raM ---

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

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?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

Move four matchsticks to the below square to form three squares?