function-machine/subtraction/starter · Set 58

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