function-machine/division/expert · Set 100

8 problems
1
Input: 4 → [?] → 12, what is the rule? =
2
Input: 6 → [-1] → ? =
3
Input: 7 → [×2 + 1] → ? =
4
Input: 2 → [?] → 4, what is the rule? =
5
Input: 5 → [+2] → ? =
6
Input: 7 → [?] → 19, what is the rule? =
7
Input: 10 → [?] → 20, what is the rule? =
8
Input: 8 → [×2 + 1] → ? =
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