When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How many times can you subtract the number 5 from 25?

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

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Do You See It?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What is more useful when it is broken?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?