medium Set 97 Form Exercise

? → [×2 + 3] → 19

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Answer: 8

SubType
find-input
Rule
×2 + 3
Input
8
Output
19
Difficulty
medium

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

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Answer: ×2

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

Input: 2 → [?] → 5, what is the rule?

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Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
2
Output
5
Difficulty
medium

? → [×3] → 6

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Answer: 2

SubType
find-input
Rule
×3
Input
2
Output
6
Difficulty
medium

? → [+10] → 15

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Answer: 5

SubType
find-input
Rule
+10
Input
5
Output
15
Difficulty
medium

? → [-1] → 6

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Answer: 7

SubType
find-input
Rule
-1
Input
7
Output
6
Difficulty
medium

Input: 9 → [?] → 8, what is the rule?

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Answer: -1

SubType
find-rule
Rule
-1
Input
9
Output
8
Difficulty
medium

Input: 10 → [?] → 9, what is the rule?

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Answer: -1

SubType
find-rule
Rule
-1
Input
10
Output
9
Difficulty
medium