We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Find the smallest sentence with all the English alphabet.

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 animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Prove that twice of ten is the same as twice of eleven.

A sundial has the fewest moving parts of any timepiece. Which has the most?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Why Wine Glass Stem is so long?