function-machine/addition/hard · Set 12

8 problems
1
Input: 4 → [?] → 3, what is the rule? =
2
Input: 4 → [?] → 6, what is the rule? =
3
Input: 7 → [?] → 21, what is the rule? =
4
Input: 1 → [?] → 1, what is the rule? =
5
Input: 8 → [?] → 16, what is the rule? =
6
? → [×2 + 3] → 15 =
7
? → [×5] → 10 =
8
Input: 3 → [×5] → ? =
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