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

What is the next number in this series?

4,12,84,3612....

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What Does this text mean:

important=important

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

What is red and smells like blue paint?

How many times can you subtract the number 5 from 25?

10+10 and 11+11 can give you the same answer.

Explain how?