Starter · Set 66

8 problems
1
? → [-3] → 1 =
2
Input: 7 → [?] → 21, what is the rule? =
3
? → [+2] → 6 =
4
? → [+10] → 14 =
5
Input: 3 → [+5] → ? =
6
? → [×5] → 5 =
7
Input: 5 → [×5] → ? =
8
Input: 8 → [?] → 16, what is the rule? =
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