medium Set 18 Form Exercise

Input: 3 → [×2] → ?

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Answer: 6

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

? → [-3] → 7

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Answer: 10

SubType
find-input
Rule
-3
Input
10
Output
7
Difficulty
medium

Input: 1 → [×2 + 1] → ?

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Answer: 3

SubType
find-output
Rule
×2 + 1
Input
1
Output
3
Difficulty
medium

Input: 1 → [?] → 3, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
1
Output
3
Difficulty
medium

Input: 4 → [×2 + 3] → ?

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Answer: 11

SubType
find-output
Rule
×2 + 3
Input
4
Output
11
Difficulty
medium

? → [×2 + 3] → 21

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Answer: 9

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

Input: 9 → [?] → 19, what is the rule?

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Answer: ×2 + 1

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