People put me on the table and cut me but do not eat me. What am I?

What is always in front of you but can’t be seen?

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

I have teeth but i don't bite. Who Am I ?

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?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

What two things can you never eat for breakfast?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?