medium Set 42 Form Exercise

? → [×3] → 21

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Answer: 7

SubType
find-input
Rule
×3
Input
7
Output
21
Difficulty
medium

Input: 3 → [×5] → ?

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Answer: 15

SubType
find-output
Rule
×5
Input
3
Output
15
Difficulty
medium

? → [×3] → 3

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Answer: 1

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

Input: 10 → [+10] → ?

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Answer: 20

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

? → [+10] → 11

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Answer: 1

SubType
find-input
Rule
+10
Input
1
Output
11
Difficulty
medium

? → [×2] → 2

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Answer: 1

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

Input: 3 → [?] → 14, what is the rule?

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Answer: +4 ×2

SubType
find-rule
Rule
+4 ×2
Input
3
Output
14
Difficulty
medium

? → [+10] → 12

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Answer: 2

SubType
find-input
Rule
+10
Input
2
Output
12
Difficulty
medium