My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Prove that twice of ten is the same as twice of eleven.

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

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

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Can you solve the below tricky visual equation?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

What always comes into a house through the keyhole?