If you say my name, I will no longer exist. What am I?

If eleven plus two equals one, what does nine plus five equal?

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?

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

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

How many letters are in the alphabet?

A monk has a very specific ritual for climbing up the steps to the temple. First, he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?