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

What does below chemistry rebus means?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

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?

What is the riddle which can be asked all day with a different correct answer each time.

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

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

What Time Should the last watch show in the below figure?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?