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

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

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

What is wrong in the below Picture?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?