You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

What number should come in place of the question mark below?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

I always drive my customer away.

Who am I?

Replace the question mark with the correct number in the below-given picture?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

What does this rebus means ?

PROG WORKRESS

There are forty elephants and they have forty-fore heads. How can this be possible?