expert Set 77 Form Exercise

? → [×2 + 3] → 9

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Answer: 3

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

Input: 7 → [+10] → ?

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Answer: 17

SubType
find-output
Rule
+10
Input
7
Output
17
Difficulty
expert

Input: 3 → [+10] → ?

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Answer: 13

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

? → [-3] → 2

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Answer: 5

SubType
find-input
Rule
-3
Input
5
Output
2
Difficulty
expert

? → [+4 ×2] → 16

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Answer: 4

SubType
find-input
Rule
+4 ×2
Input
4
Output
16
Difficulty
expert

? → [×5] → 15

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Answer: 3

SubType
find-input
Rule
×5
Input
3
Output
15
Difficulty
expert

Input: 9 → [-1] → ?

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Answer: 8

SubType
find-output
Rule
-1
Input
9
Output
8
Difficulty
expert

Input: 3 → [?] → 7, what is the rule?

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Answer: ×3 - 2

SubType
find-rule
Rule
×3 - 2
Input
3
Output
7
Difficulty
expert