hard Set 31 Form Exercise

? → [×3 - 2] → 13

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Answer: 5

SubType
find-input
Rule
×3 - 2
Input
5
Output
13
Difficulty
hard

Input: 6 → [?] → 13, what is the rule?

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Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
6
Output
13
Difficulty
hard

? → [+4 ×2] → 22

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Answer: 7

SubType
find-input
Rule
+4 ×2
Input
7
Output
22
Difficulty
hard

Input: 2 → [?] → 6, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
2
Output
6
Difficulty
hard

Input: 8 → [?] → 7, what is the rule?

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Answer: -1

SubType
find-rule
Rule
-1
Input
8
Output
7
Difficulty
hard

Input: 6 → [?] → 12, what is the rule?

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Answer: ×2

SubType
find-rule
Rule
×2
Input
6
Output
12
Difficulty
hard

Input: 2 → [?] → 4, what is the rule?

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Answer: ×2

SubType
find-rule
Rule
×2
Input
2
Output
4
Difficulty
hard

? → [+4 ×2] → 26

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Answer: 9

SubType
find-input
Rule
+4 ×2
Input
9
Output
26
Difficulty
hard