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