Medium · Set 56

8 problems
1
? → [×5] → 15 =
2
Input: 10 → [?] → 9, what is the rule? =
3
Input: 2 → [?] → 6, what is the rule? =
4
? → [×3] → 6 =
5
Input: 4 → [?] → 8, what is the rule? =
6
? → [+4 ×2] → 26 =
7
? → [-3] → 1 =
8
Input: 3 → [?] → 5, what is the rule? =
Easy Math Print · easymathprint.com