One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Which alphabet letter is a question?

Why is the Hole below a Lock?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What is black when you buy it, red when you use it, and gray when you throw it away?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Move four matchsticks to the below square to form three squares?