Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which is the smallest number that you can write using all the vowels exactly once?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What Adam and Eve do not have but the rest of the people have?

There are forty elephants and they have forty-fore heads. How can this be possible?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What is the word or phrase below?
R | E | A | D

The more of this there is, the less you see. What is it?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.