function-machine/addition/starter · Set 90

8 problems
1
Input: 8 → [?] → 13, what is the rule? =
2
Input: 5 → [?] → 25, what is the rule? =
3
Input: 6 → [-3] → ? =
4
? → [-1] → 5 =
5
? → [×5] → 5 =
6
Input: 9 → [?] → 11, what is the rule? =
7
? → [+10] → 18 =
8
? → [+5] → 13 =
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