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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

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 have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

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.

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What has to be broken before you can use it?

What jumps when it walks and sits when it stands?