why number 8549176320 is one of a kind?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

I am white when I am dirty, and black when I am clean. What am I?

What English word has three consecutive double letters?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Which is the rope you never skip with?

What does this rebus photo means?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What is so fragile that saying its name breaks it?