Answer:
Between 25 and -18 is 0.
Between -18 and -12 (in the corner) is again, 0.
Between -12 and -18 (left side corner, bottom) is 5.
Between 0 and -12 (top left corner) is -18.
Between 0 and 5 (top of page) is 25
Between 5 and -12 (bottom right corner) is 0
Between -18 and 25 (middle) is 5
Between -18 and 0 (middle) is -12
Between -12 and 0 (middle-left) is 5
Between -12 and -18 (not corner, but above it) is 25.
Step-by-step explanation:
I don't really have a explanation, other than elimination.