function-machine/subtraction/starter · Set 17

7 problems
1
Input: 5 → [?] → 4, what is the rule? =
2
? → [×5] → 45 =
3
Input: 7 → [+2] → ? =
4
Input: 5 → [+5] → ? =
5
? → [+2] → 7 =
6
Input: 3 → [?] → 9, what is the rule? =
7
Input: 6 → [-1] → ? =
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