why number 8549176320 is one of a kind?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What is the word or phrase?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?