Number Sense Patterns Missing Operator — Set 21

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easy Set 21
  1. 1 __ 9 = 10
  2. 8 __ 9 = 72
  3. 15 ○ 10 = 5, what is ○?
  4. 10 __ 2 = 8
  5. 6 __ 6 = 36
  6. 12 ○ 5 = 7, what is ○?
  7. 12 __ 4 = 8
  8. 5 __ 1 = 6
  9. 10 __ 1 = 11
  10. 60 ○ 6 = 10, what is ○?
  11. 3 ○ 4 = 12, what is ○?
  12. 7 ○ 10 = 17, what is ○?
  13. 14 __ 6 = 8
  14. 8 __ 3 = 24
  15. 49 __ 7 = 7
  16. 7 ○ 9 = 63, what is ○?
  17. 10 ○ 3 = 7, what is ○?
  18. 10 __ 8 = 80
  19. 3 __ 10 = 30
  20. 10 __ 4 = 14
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