function-machine/subtraction/medium · Sada 78

8 problems
1
Input: 4 → [?] → 12, what is the rule? =
2
Input: 4 → [?] → 16, what is the rule? =
3
Input: 3 → [-1] → ? =
4
? → [+10] → 15 =
5
? → [×5] → 30 =
6
Input: 9 → [?] → 8, what is the rule? =
7
? → [-1] → 7 =
8
Input: 8 → [×3 - 2] → ? =
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