Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Can you find out which options fits best with the missing column?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

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

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

What is the end of everything?