Function Machines · Set 34

8 problems
1
Input: 6 → [?] → 16, what is the rule? =
2
Input: 8 → [-3] → ? =
3
Input: 6 → [?] → 18, what is the rule? =
4
? → [+5] → 12 =
5
? → [-1] → 4 =
6
? → [+10] → 16 =
7
Input: 4 → [?] → 14, what is the rule? =
8
Input: 10 → [?] → 20, what is the rule? =
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