What has one letter and starts with an E?

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

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

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

Can you find the missing rabbit the magician? Remember, you just have 11 seconds to complete the task!

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am white when I am dirty, and black when I am clean. What am I?

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?

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

How many sides does a circle have?