medium Set 47 Form Exercise

? → [×3] → 9

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Answer: 3

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

Input: 3 → [?] → 5, what is the rule?

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Answer: +2

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

? → [×3] → 30

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Answer: 10

SubType
find-input
Rule
×3
Input
10
Output
30
Difficulty
medium

Input: 8 → [×3] → ?

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Answer: 24

SubType
find-output
Rule
×3
Input
8
Output
24
Difficulty
medium

Input: 9 → [?] → 18, what is the rule?

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Answer: ×2

SubType
find-rule
Rule
×2
Input
9
Output
18
Difficulty
medium

Input: 8 → [×2] → ?

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Answer: 16

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

Input: 10 → [-1] → ?

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Answer: 9

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

? → [-1] → 7

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Answer: 8

SubType
find-input
Rule
-1
Input
8
Output
7
Difficulty
medium