Easy · Set 72

8 problems
1
? → [-3] → 2 =
2
Input: 8 → [?] → 13, what is the rule? =
3
? → [×3] → 6 =
4
? → [×5] → 10 =
5
? → [+2] → 11 =
6
? → [×2] → 8 =
7
Input: 3 → [-3] → ? =
8
Input: 4 → [×5] → ? =
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