Character Puzzles - General Questions

Find the missing number:

5   2   21
4   1   15
2   1   ?

Find the missing number:

3   2   5
6   4   20
3   1   ?

Find the missing number:

3   2   5
8   5   39
4   1   ?

Find the missing number:

2   1   2
9   6   54
9   2   ?

Find the missing number:

4   2   12
2   1   4
8   7   ?