A short number-riddle for warm-up:
There are 4 blocks with 5 numbers each. Which one fits in the place of the "?"?
22 4
102
2 5
8 5
264
11 6
6 11
-711
2 3
9 8
?
77 2
Edit: I rolled back the last edit, since the indention may be relevant for the solution ;)