Starter · Set 84

8 problems
1
? → [-1] → 2 =
2
Input: 8 → [?] → 10, what is the rule? =
3
Input: 9 → [?] → 19, what is the rule? =
4
? → [+2] → 11 =
5
? → [+2] → 6 =
6
? → [×2] → 8 =
7
? → [+5] → 13 =
8
Input: 7 → [+2] → ? =
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