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

If an electric train is travelling south, then which way is the smoke going?

What can go up a chimney down, but can't go down a chimney up?

I am the fastest animal but cannot climb the tree. What am I?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

I have no life, but I can die. What am I?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you count the chocolates in hand?