- 3 ○ 6 = 9, what is ○?
- 1 ○ 3 = 4, what is ○?
- 4 __ 3 = 12
- 10 ○ 9 = 90, what is ○?
- 7 ○ 6 = 42, what is ○?
- 8 __ 8 = 64
- 3 ○ 1 = 4, what is ○?
- 64 ○ 8 = 8, what is ○?
- 10 __ 9 = 90
- 40 __ 8 = 5
- 5 __ 9 = 14
- 10 ○ 8 = 18, what is ○?
- 4 ○ 7 = 28, what is ○?
- 28 __ 7 = 4
- 24 __ 6 = 4
- 4 __ 8 = 32
- 10 ○ 8 = 2, what is ○?
- 13 __ 10 = 3
- 13 ○ 8 = 5, what is ○?
- 4 ○ 2 = 8, what is ○?