function-machine/subtraction/medium · مجموعة 37

8 problems
1
? → [+4 ×2] → 12 =
2
Input: 6 → [?] → 18, what is the rule? =
3
Input: 3 → [×5] → ? =
4
? → [×2] → 6 =
5
Input: 3 → [×3] → ? =
6
Input: 2 → [?] → 10, what is the rule? =
7
Input: 6 → [?] → 16, what is the rule? =
8
Input: 2 → [+2] → ? =
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