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

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

What has one letter and starts with an E?

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 I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

What breaks yet never falls, and what falls yet never breaks?