function-machine/subtraction/expert · Set 50

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