I travel all around the world but always stay in the corner. What am I?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

Can you replace the question mark with the correct number in the below table sequence?

What runs around the whole yard without moving?

Can you find out the missing number in the grid?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

What goes up but never comes down?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

I am white when I am dirty, and black when I am clean. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?