Character Puzzles - General Questions

Find the missing number:

9   5   56
9   6   45
5   4   ?

Find the missing number:

3   1   3
2   1   2
7   5   ?

Find the missing number:

4   2   8
2   1   2
3   2   ?

Find the missing number:

3   1   8
3   2   10
6   2   ?

Find the missing number:

3   2   5
5   4   9
7   6   ?