I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What is harder to catch the faster you run?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What brings you down but never up?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Who can jump higher than a Mountain?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

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?