What goes up but never comes down?

What jumps when it walks and sits when it stands?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What do you get if you add 2 to 100 four times?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

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?

Why Aeroplane windows are round?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

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?