function-machine/subtraction/medium · Conjunto 15

8 problems
1
Input: 7 → [?] → 12, what is the rule? =
2
Input: 6 → [?] → 11, what is the rule? =
3
? → [×2 + 1] → 21 =
4
? → [+4 ×2] → 28 =
5
Input: 10 → [?] → 21, what is the rule? =
6
? → [×3 - 2] → 4 =
7
Input: 9 → [?] → 45, what is the rule? =
8
? → [+2] → 9 =
Easy Math Print · easymathprint.com