medium Set 99 Form Exercise

Input: 3 → [-1] → ?

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Answer: 2

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

? → [×2 + 3] → 11

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Answer: 4

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

Input: 10 → [?] → 20, what is the rule?

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Answer: ×2

SubType
find-rule
Rule
×2
Input
10
Output
20
Difficulty
medium

? → [×2 + 3] → 9

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Answer: 3

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

? → [×2] → 8

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Answer: 4

SubType
find-input
Rule
×2
Input
4
Output
8
Difficulty
medium

Input: 4 → [+5] → ?

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Answer: 9

SubType
find-output
Rule
+5
Input
4
Output
9
Difficulty
medium

Input: 5 → [?] → 2, what is the rule?

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Answer: -3

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

? → [×2 + 3] → 21

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Answer: 9

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