function-machine/addition/starter · Set 60

8 problems
1
Input: 10 → [?] → 9, what is the rule? =
2
? → [×3] → 21 =
3
Input: 9 → [?] → 14, what is the rule? =
4
? → [×5] → 5 =
5
Input: 4 → [-1] → ? =
6
Input: 2 → [+10] → ? =
7
? → [+10] → 12 =
8
Input: 10 → [?] → 50, what is the rule? =
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