function-machine/subtraction/medium · Satz 39

8 problems
1
Input: 4 → [?] → 20, what is the rule? =
2
Input: 5 → [×2] → ? =
3
? → [+2] → 5 =
4
? → [×2 + 3] → 23 =
5
? → [×5] → 45 =
6
Input: 9 → [+2] → ? =
7
? → [+2] → 12 =
8
Input: 2 → [?] → 7, what is the rule? =
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