function-machine/mixed-medium · 套题 53

8 problems
1
Input: 7 → [?] → 15, what is the rule? =
2
? → [×3 - 2] → 19 =
3
Input: 2 → [×2] → ? =
4
Input: 8 → [?] → 13, what is the rule? =
5
? → [+4 ×2] → 12 =
6
? → [×2 + 1] → 21 =
7
? → [+2] → 10 =
8
Input: 9 → [+5] → ? =
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