why number 8549176320 is one of a kind?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What seven-letter word has hundreds of letters in it?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What 5-letter word typed in all capital letters can be read the same upside down?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

What does below rebus means ?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

What is so fragile that saying its name breaks it?