function-machine/subtraction/expert · Set 40

8 problems
1
Input: 2 → [?] → 7, what is the rule? =
2
? → [-3] → 7 =
3
Input: 1 → [?] → 3, what is the rule? =
4
Input: 2 → [?] → 12, what is the rule? =
5
Input: 6 → [?] → 3, what is the rule? =
6
Input: 8 → [?] → 7, what is the rule? =
7
? → [×2 + 1] → 21 =
8
? → [+10] → 14 =
Easy Math Print · easymathprint.com