How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

What is the coolest letter in the alphabet?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

Considering the below equation:

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

Then, I + II + III = ?

I look at you, you look at me I raise my right, you raise your left. What am I?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

How can one talk without saying a single word?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?