function-machine/subtraction/medium · Sada 86

8 problems
1
? → [×2 + 1] → 9 =
2
Input: 8 → [×2 + 3] → ? =
3
Input: 8 → [?] → 10, what is the rule? =
4
? → [×3] → 15 =
5
Input: 4 → [?] → 14, what is the rule? =
6
Input: 7 → [?] → 17, what is the rule? =
7
Input: 3 → [-3] → ? =
8
Input: 2 → [×3] → ? =
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