medium Set 83 Form Exercise

? → [×2 + 3] → 15

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Answer: 6

SubType
find-input
Rule
×2 + 3
Input
6
Output
15
Difficulty
medium

Input: 9 → [?] → 25, what is the rule?

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Answer: ×3 - 2

SubType
find-rule
Rule
×3 - 2
Input
9
Output
25
Difficulty
medium

Input: 10 → [+10] → ?

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Answer: 20

SubType
find-output
Rule
+10
Input
10
Output
20
Difficulty
medium

? → [×5] → 25

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Answer: 5

SubType
find-input
Rule
×5
Input
5
Output
25
Difficulty
medium

? → [×3] → 30

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Answer: 10

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

Input: 6 → [+2] → ?

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Answer: 8

SubType
find-output
Rule
+2
Input
6
Output
8
Difficulty
medium

? → [×2 + 3] → 21

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Answer: 9

SubType
find-input
Rule
×2 + 3
Input
9
Output
21
Difficulty
medium