easy Set 21 Form Exercise

? → [-1] → 7

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Answer: 8

SubType
find-input
Rule
-1
Input
8
Output
7
Difficulty
normal

Input: 10 → [+10] → ?

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Answer: 20

SubType
find-output
Rule
+10
Input
10
Output
20
Difficulty
normal

Input: 9 → [+2] → ?

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Answer: 11

SubType
find-output
Rule
+2
Input
9
Output
11
Difficulty
normal

Input: 2 → [?] → 6, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
2
Output
6
Difficulty
normal

Input: 4 → [×2] → ?

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Answer: 8

SubType
find-output
Rule
×2
Input
4
Output
8
Difficulty
normal

? → [×3] → 3

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Answer: 1

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

Input: 10 → [-1] → ?

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Answer: 9

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