If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Can you find the missing piece of the Porsche?

How can you take 2 from 5 and leave 4?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

What word begins and ends with an E, but has only one letter?

During which month do people sleep the least?

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.

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?