1
Input: 4 → [×2 + 3] → ? =
2
Input: 6 → [×2 + 1] → ? =
3
Input: 10 → [?] → 12, what is the rule? =
4
Input: 8 → [?] → 5, what is the rule? =
6
Input: 6 → [?] → 20, what is the rule? =
7
Input: 7 → [?] → 15, what is the rule? =
8
Input: 1 → [?] → 3, what is the rule? =