Mixed Medium · Set 52

8 problems
1
? → [×3] → 6 =
2
? → [+5] → 12 =
3
Input: 3 → [?] → 14, what is the rule? =
4
Input: 5 → [?] → 15, what is the rule? =
5
Input: 5 → [?] → 7, what is the rule? =
6
? → [+5] → 9 =
7
Input: 9 → [+10] → ? =
8
Input: 3 → [-3] → ? =
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