easy Set 99 Form Exercise

Input: 4 → [?] → 6, what is the rule?

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Answer: +2

SubType
find-rule
Rule
+2
Input
4
Output
6
Difficulty
normal

? → [+2] → 12

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Answer: 10

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

? → [+2] → 5

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Answer: 3

SubType
find-input
Rule
+2
Input
3
Output
5
Difficulty
normal

? → [×2] → 18

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Answer: 9

SubType
find-input
Rule
×2
Input
9
Output
18
Difficulty
normal

Input: 9 → [-1] → ?

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Answer: 8

SubType
find-output
Rule
-1
Input
9
Output
8
Difficulty
normal

Input: 10 → [+5] → ?

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Answer: 15

SubType
find-output
Rule
+5
Input
10
Output
15
Difficulty
normal

? → [×2] → 2

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Answer: 1

SubType
find-input
Rule
×2
Input
1
Output
2
Difficulty
normal

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

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Answer: ×3

SubType
find-rule
Rule
×3
Input
5
Output
15
Difficulty
normal