1. What score did you get?

I got 22.
2. What is your score?
It is 22.
3. How much score did you get?
I got 22.
4. How many scores did you get?
I got 22.
(Are all grammatical and the same?)

5. Add up all the scores, and then you can get the total score. What is your total score? It is 17. Really? That means your are happy?
(Are the pasage correct?)

3 answers

1 and 2 are fine, and they mean the same thing; 3 and 4 are not, but wouldn't mean the same thing even if they were corrected.

5 is correct.
5 is fine except for the last line "That means your are happy?". 'That means you're happy' is a much better sentence.
Jordan is right. It should be "you're" or "you are" not "your."