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

Find 3 Differences Within This Excursion Scene In 20 Seconds

What month of the year has 28 days?

What have one eye but still cannot see?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Riddle me this, Riddle me that,
What am I? I am made of wood, but you can't see me down?

Do You See It?

If a wheel has 54 spokes, how many spaces are there between the spokes?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?