expert Set 84 Form Exercise

Input: 3 → [×2] → ?

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Answer: 6

SubType
find-output
Rule
×2
Input
3
Output
6
Difficulty
expert

Input: 10 → [?] → 30, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
10
Output
30
Difficulty
expert

? → [-1] → 0

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Answer: 1

SubType
find-input
Rule
-1
Input
1
Output
0
Difficulty
expert

Input: 1 → [?] → 2, what is the rule?

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Answer: ×2

SubType
find-rule
Rule
×2
Input
1
Output
2
Difficulty
expert

Input: 10 → [?] → 20, what is the rule?

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Answer: +10

SubType
find-rule
Rule
+10
Input
10
Output
20
Difficulty
expert

? → [×2 + 1] → 15

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Answer: 7

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

Input: 10 → [-1] → ?

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Answer: 9

SubType
find-output
Rule
-1
Input
10
Output
9
Difficulty
expert

? → [×2 + 3] → 23

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Answer: 10

SubType
find-input
Rule
×2 + 3
Input
10
Output
23
Difficulty
expert