hard Set 90 Form Exercise

? → [+2] → 3

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Answer: 1

SubType
find-input
Rule
+2
Input
1
Output
3
Difficulty
hard

? → [×2 + 3] → 9

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Answer: 3

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

Input: 5 → [×2 + 3] → ?

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Answer: 13

SubType
find-output
Rule
×2 + 3
Input
5
Output
13
Difficulty
hard

Input: 10 → [?] → 21, what is the rule?

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Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
10
Output
21
Difficulty
hard

? → [+10] → 18

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Answer: 8

SubType
find-input
Rule
+10
Input
8
Output
18
Difficulty
hard

Input: 10 → [?] → 28, what is the rule?

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Answer: ×3 - 2

SubType
find-rule
Rule
×3 - 2
Input
10
Output
28
Difficulty
hard

? → [×3 - 2] → 16

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Answer: 6

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

Input: 10 → [×5] → ?

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Answer: 50

SubType
find-output
Rule
×5
Input
10
Output
50
Difficulty
hard