Easy · Set 20

8 problems
1
? → [+5] → 14 =
2
Input: 5 → [-1] → ? =
3
Input: 10 → [?] → 9, what is the rule? =
4
Input: 6 → [?] → 5, what is the rule? =
5
Input: 9 → [?] → 6, what is the rule? =
6
Input: 10 → [?] → 7, what is the rule? =
7
? → [+10] → 18 =
8
Input: 8 → [?] → 24, what is the rule? =
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