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

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

It is always ahead of me yet I can never see it. What is it?

What goes up but never comes down?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What English word has three consecutive double letters?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What 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?