Can it be possible to build a house that has all its four walls facing towards the South?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Which is the correct shadow of the bird?

I’m tall when I’m young, and I’m short when I’m old. What am I?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

What number should come in place of the question mark below?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?