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

What does this rebus means ?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

When does a USA Potato change its nationality?

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

John was drowned by he was not wet. How?

Count the squares in the matchstick puzzle below?

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

Can you spot the man between the coffee bean in the picture below ?