If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Can you make a six-letter word using the letters N, A and B ?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Look at the picture and find out which square is not linked with any of the other squares.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?