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

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

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Solve the equation in the image by looking at the pattern closely.

How can a man go eight days without sleep?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

I look at you, you look at me, I raise my right, you raise your left. What am I?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?