function-machine/subtraction/starter · Set 61

7 problems
1
Input: 5 → [?] → 4, what is the rule? =
2
Input: 10 → [?] → 12, what is the rule? =
3
Input: 5 → [?] → 25, what is the rule? =
4
? → [+5] → 15 =
5
Input: 4 → [+10] → ? =
6
Input: 5 → [×5] → ? =
7
? → [-1] → 2 =
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