hard Set 30 Form Exercise

? → [×2 + 3] → 21

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Answer: 9

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

Input: 6 → [?] → 16, what is the rule?

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Answer: ×3 - 2

SubType
find-rule
Rule
×3 - 2
Input
6
Output
16
Difficulty
hard

Input: 5 → [×2] → ?

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Answer: 10

SubType
find-output
Rule
×2
Input
5
Output
10
Difficulty
hard

? → [+10] → 12

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Answer: 2

SubType
find-input
Rule
+10
Input
2
Output
12
Difficulty
hard

Input: 9 → [?] → 27, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
9
Output
27
Difficulty
hard

Input: 7 → [×3 - 2] → ?

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Answer: 19

SubType
find-output
Rule
×3 - 2
Input
7
Output
19
Difficulty
hard

? → [×2] → 14

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Answer: 7

SubType
find-input
Rule
×2
Input
7
Output
14
Difficulty
hard

Input: 9 → [×2 + 3] → ?

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Answer: 21

SubType
find-output
Rule
×2 + 3
Input
9
Output
21
Difficulty
hard