Medium · Set 19

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