Answer:
A beggar's brother went out to sea and drowned. But the man who drowned had no brother. Who was the beggar to the man who drowned?
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
No matter how little or how much you use me, you change me every month.
What is full of holes, but can still hold a lot of water?
Thousands of these come together to make a digital image. What is it?
I stay where I am when I go off. What am I?