A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

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

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

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 time is it when an elephant sits on a fence?

There was a strange boy who was born before his father. How can this be possible?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

What happened when the wheel was invented?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?