What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

No matter how little or how much you use me, you change me every month. What am I?

How can one talk without saying a single word?

Which alphabet is a part of our body?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

How far can you walk into the woods?