hard Set 54 Form Exercise

Input: 8 → [×2 + 3] → ?

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Answer: 19

SubType
find-output
Rule
×2 + 3
Input
8
Output
19
Difficulty
hard

? → [+2] → 12

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Answer: 10

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

Input: 8 → [?] → 22, what is the rule?

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Answer: ×3 - 2

SubType
find-rule
Rule
×3 - 2
Input
8
Output
22
Difficulty
hard

? → [-1] → 6

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Answer: 7

SubType
find-input
Rule
-1
Input
7
Output
6
Difficulty
hard

? → [+2] → 7

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Answer: 5

SubType
find-input
Rule
+2
Input
5
Output
7
Difficulty
hard

Input: 5 → [?] → 15, what is the rule?

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Answer: +10

SubType
find-rule
Rule
+10
Input
5
Output
15
Difficulty
hard

? → [+2] → 4

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Answer: 2

SubType
find-input
Rule
+2
Input
2
Output
4
Difficulty
hard

? → [×2 + 1] → 15

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Answer: 7

SubType
find-input
Rule
×2 + 1
Input
7
Output
15
Difficulty
hard