medium Set 68 Form Exercise

Input: 4 → [×3] → ?

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Answer: 12

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

Input: 10 → [?] → 21, what is the rule?

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Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
10
Output
21
Difficulty
medium

? → [+4 ×2] → 20

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Answer: 6

SubType
find-input
Rule
+4 ×2
Input
6
Output
20
Difficulty
medium

? → [+5] → 13

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Answer: 8

SubType
find-input
Rule
+5
Input
8
Output
13
Difficulty
medium

Input: 3 → [?] → 8, what is the rule?

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Answer: +5

SubType
find-rule
Rule
+5
Input
3
Output
8
Difficulty
medium

Input: 8 → [×2] → ?

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Answer: 16

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

Input: 4 → [?] → 12, what is the rule?

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Answer: ×3

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

? → [+4 ×2] → 18

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Answer: 5

SubType
find-input
Rule
+4 ×2
Input
5
Output
18
Difficulty
medium