1
Input: 9 → [?] → 8, what is the rule? =
2
Input: 8 → [?] → 17, what is the rule? =
4
Input: 10 → [?] → 23, what is the rule? =
5
Input: 9 → [?] → 6, what is the rule? =
6
Input: 2 → [?] → 4, what is the rule? =
8
Input: 9 → [?] → 27, what is the rule? =