1
Input: 4 → [×2 + 3] → ? =
2
Input: 9 → [?] → 45, what is the rule? =
3
Input: 6 → [?] → 3, what is the rule? =
4
Input: 7 → [?] → 22, what is the rule? =
5
Input: 2 → [?] → 7, what is the rule? =
6
Input: 10 → [?] → 23, what is the rule? =
7
Input: 2 → [×2 + 3] → ? =