medium Set 79 Form Exercise

Input: 5 → [?] → 13, what is the rule?

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Answer: ×2 + 3

SubType
find-rule
Rule
×2 + 3
Input
5
Output
13
Difficulty
medium

? → [×2 + 1] → 19

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Answer: 9

SubType
find-input
Rule
×2 + 1
Input
9
Output
19
Difficulty
medium

? → [×3] → 27

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Answer: 9

SubType
find-input
Rule
×3
Input
9
Output
27
Difficulty
medium

Input: 9 → [-1] → ?

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Answer: 8

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

? → [×2 + 3] → 19

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Answer: 8

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

Input: 8 → [×2] → ?

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Answer: 16

SubType
find-output
Rule
×2
Input
8
Output
16
Difficulty
medium

Input: 7 → [?] → 17, what is the rule?

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Answer: ×2 + 3

SubType
find-rule
Rule
×2 + 3
Input
7
Output
17
Difficulty
medium

? → [×3] → 12

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Answer: 4

SubType
find-input
Rule
×3
Input
4
Output
12
Difficulty
medium