$1 \ \square \ 2 \ \square \ 3 \ \square \ 4$
If we only used plus signs and minus signs in place of the boxes above, how many distinct values can we obtain?
+526 1 + 2 + 3 + 4 = 10
1 + 2 + 3 - 4 = 2
1 + 2 - 3 + 4 = 4
1 - 2 + 3 + 4 = 6
1 + 2 - 3 - 4 = -4
1 - 2 - 3 + 4 = 0
1 - 2 - 3 - 4 = -8
So yeah! I think that's it 
