There is something which is always coming but never arrives?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

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?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What goes up but never comes down?

I taste better than I can smell. Who am I?

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?

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