easy Set 31 Form Exercise

? → [+2] → 6

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Answer: 4

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

Input: 7 → [?] → 21, what is the rule?

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Answer: ×3

SubType
find-rule
Rule
×3
Input
7
Output
21
Difficulty
normal

? → [×5] → 25

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Answer: 5

SubType
find-input
Rule
×5
Input
5
Output
25
Difficulty
normal

Input: 9 → [-1] → ?

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Answer: 8

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

Input: 1 → [+2] → ?

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Answer: 3

SubType
find-output
Rule
+2
Input
1
Output
3
Difficulty
normal

Input: 5 → [-3] → ?

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Answer: 2

SubType
find-output
Rule
-3
Input
5
Output
2
Difficulty
normal

Input: 4 → [?] → 6, what is the rule?

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Answer: +2

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

Input: 9 → [?] → 19, what is the rule?

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Answer: +10

SubType
find-rule
Rule
+10
Input
9
Output
19
Difficulty
normal