1
Input: 7 → [?] → 35, what is the rule? =
3
Input: 10 → [?] → 28, what is the rule? =
4
Input: 8 → [?] → 16, what is the rule? =
5
Input: 3 → [?] → 15, what is the rule? =
6
Input: 3 → [?] → 8, what is the rule? =
7
Input: 2 → [?] → 1, what is the rule? =