function-machine/addition/expert · Set 17

7 problems
1
Input: 6 → [?] → 13, what is the rule? =
2
? → [×5] → 15 =
3
Input: 1 → [?] → 1, what is the rule? =
4
Input: 4 → [×2 + 1] → ? =
5
Input: 3 → [?] → 14, what is the rule? =
6
Input: 10 → [?] → 9, what is the rule? =
7
? → [×2] → 12 =
Easy Math Print · easymathprint.com