When we see 2 but call 10?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

What makes this number unique: 8,549,176,320?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

I am quite hot but become too cold if you remove the first two letters. What am I?

Imagine you are in a room with no windows or doors. How will you get out?

why number 8549176320 is one of a kind?

There is a rock group of four men that do not sing. Name It?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?