medium Set 97 Form Exercise

Input: 9 → [×2] → ?

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Answer: 18

SubType
find-output
Rule
×2
Input
9
Output
18
Difficulty
medium

Input: 9 → [?] → 8, what is the rule?

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Answer: -1

SubType
find-rule
Rule
-1
Input
9
Output
8
Difficulty
medium

Input: 9 → [×2 + 1] → ?

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Answer: 19

SubType
find-output
Rule
×2 + 1
Input
9
Output
19
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: 9 → [+2] → ?

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Answer: 11

SubType
find-output
Rule
+2
Input
9
Output
11
Difficulty
medium

? → [+2] → 9

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Answer: 7

SubType
find-input
Rule
+2
Input
7
Output
9
Difficulty
medium

Input: 3 → [+10] → ?

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Answer: 13

SubType
find-output
Rule
+10
Input
3
Output
13
Difficulty
medium

Input: 2 → [×3 - 2] → ?

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Answer: 4

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