Medium · Set 87

8 problems
1
Input: 10 → [+4 ×2] → ? =
2
Input: 4 → [?] → 10, what is the rule? =
3
? → [+4 ×2] → 22 =
4
? → [×3] → 21 =
5
? → [×2 + 1] → 15 =
6
? → [×2] → 8 =
7
Input: 1 → [?] → 3, what is the rule? =
8
Input: 9 → [?] → 25, what is the rule? =
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