What is the fastest way to double your money?

What country can make you shiver?

What time is it when an elephant sits on a fence?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What's the only room from which no one can enter or leave

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

The answer I give is yes, but what I mean is no. What was the question?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?