function-machine/subtraction/expert · Set 78

8 problems
1
Input: 3 → [?] → 9, what is the rule? =
2
? → [×3 - 2] → 1 =
3
Input: 10 → [?] → 30, what is the rule? =
4
? → [+10] → 13 =
5
Input: 6 → [×3] → ? =
6
Input: 8 → [+4 ×2] → ? =
7
Input: 2 → [?] → 12, what is the rule? =
8
Input: 3 → [?] → 15, what is the rule? =
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