why number 8549176320 is one of a kind?

You bought me for dinner but never eat me. What am I?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

I look at you, you look at me I raise my right, you raise your left. What am I?

It belongs to you, but other people use it more than you do. What is it?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

A monk has a very specific ritual for climbing up the steps to the temple. First, he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Find the last number in the series below:

voN luJ yaM raM ---

Can you find out the number that should replace the question mark with a valid reason?