function-machine/addition/starter · Set 37

8 problems
1
Input: 8 → [?] → 13, what is the rule? =
2
? → [×2] → 18 =
3
? → [×5] → 15 =
4
Input: 1 → [?] → 2, what is the rule? =
5
Input: 2 → [+5] → ? =
6
? → [-1] → 9 =
7
? → [-1] → 2 =
8
Input: 7 → [?] → 21, what is the rule? =
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