What is the riddle which can be asked all day with a different correct answer each time.

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

What's a single-digit number with no value?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

If six children and two dogs were under an umbrella, how come none of them got wet?

When it's bad luck to meet a black cat?

Which alphabet is a part of our body?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.