expert Set 52 Form Exercise

? → [×2 + 1] → 19

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Answer: 9

SubType
find-input
Rule
×2 + 1
Input
9
Output
19
Difficulty
expert

? → [×2 + 3] → 13

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Answer: 5

SubType
find-input
Rule
×2 + 3
Input
5
Output
13
Difficulty
expert

? → [×2] → 18

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Answer: 9

SubType
find-input
Rule
×2
Input
9
Output
18
Difficulty
expert

Input: 1 → [+4 ×2] → ?

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Answer: 10

SubType
find-output
Rule
+4 ×2
Input
1
Output
10
Difficulty
expert

Input: 9 → [+10] → ?

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Answer: 19

SubType
find-output
Rule
+10
Input
9
Output
19
Difficulty
expert

? → [+5] → 12

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Answer: 7

SubType
find-input
Rule
+5
Input
7
Output
12
Difficulty
expert

? → [×2 + 1] → 11

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Answer: 5

SubType
find-input
Rule
×2 + 1
Input
5
Output
11
Difficulty
expert

? → [×2] → 10

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Answer: 5

SubType
find-input
Rule
×2
Input
5
Output
10
Difficulty
expert