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

Count the number of balls in picture below:

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

What number should come in place of the question mark below?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Make a sentence consisting of three words that have the whole alphabet.

Which English verb becomes past tense just by rearranging the letters?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?