John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

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

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What do you see in the image below

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

By using 'because' continuously three times, can you make an English statement ?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?