function-machine/addition/hard · Set 56

8 problems
1
Input: 8 → [?] → 19, what is the rule? =
2
? → [-1] → 1 =
3
Input: 9 → [-1] → ? =
4
Input: 7 → [?] → 14, what is the rule? =
5
? → [×2 + 1] → 9 =
6
? → [×3 - 2] → 25 =
7
? → [×5] → 40 =
8
Input: 3 → [?] → 6, what is the rule? =
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