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

One of the leprechaun is missing if you see the two pictures attached to this question. Where did he go? When he comes back, do you know where has he been?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

If eleven plus two equals one, what does nine plus five equal?

what one word does the below rebus identifies?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

What is red and smells like blue paint?