medium Set 87 Form Exercise

Input: 1 → [-1] → ?

SubType
find-output
Rule
-1
Input
1
Output
0
Difficulty
medium

Input: 6 → [?] → 18, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
6
Output
18
Difficulty
medium

? → [+5] → 11

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Answer: 6

SubType
find-input
Rule
+5
Input
6
Output
11
Difficulty
medium

Input: 5 → [×5] → ?

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Answer: 25

SubType
find-output
Rule
×5
Input
5
Output
25
Difficulty
medium

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
medium

Input: 9 → [?] → 11, what is the rule?

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Answer: +2

SubType
find-rule
Rule
+2
Input
9
Output
11
Difficulty
medium

? → [×3] → 3

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Answer: 1

SubType
find-input
Rule
×3
Input
1
Output
3
Difficulty
medium

? → [-1] → 1

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Answer: 2

SubType
find-input
Rule
-1
Input
2
Output
1
Difficulty
medium