4
78 ○ 31 47, what is ○? =
5
28 ○ 21 7, what is ○? =
6
11 ○ 7 77, what is ○? =
9
48 ○ 4 12, what is ○? =
11
44 ○ 11 4, what is ○? =
13
4 ○ 4 16, what is ○? =
14
24 ○ 12 2, what is ○? =
16
56 ○ 22 34, what is ○? =
17
56 ○ 25 31, what is ○? =
19
63 ○ 9 7, what is ○? =