starter Set 42 Form Exercise

? → [+2] → 9

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Answer: 7

SubType
find-input
Rule
+2
Input
7
Output
9
Difficulty
starter

? → [×5] → 5

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Answer: 1

SubType
find-input
Rule
×5
Input
1
Output
5
Difficulty
starter

Input: 4 → [+5] → ?

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Answer: 9

SubType
find-output
Rule
+5
Input
4
Output
9
Difficulty
starter

? → [+10] → 17

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Answer: 7

SubType
find-input
Rule
+10
Input
7
Output
17
Difficulty
starter

? → [+5] → 10

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Answer: 5

SubType
find-input
Rule
+5
Input
5
Output
10
Difficulty
starter

Input: 6 → [-1] → ?

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Answer: 5

SubType
find-output
Rule
-1
Input
6
Output
5
Difficulty
starter

? → [+10] → 18

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Answer: 8

SubType
find-input
Rule
+10
Input
8
Output
18
Difficulty
starter

Input: 6 → [×2] → ?

Show answer

Answer: 12

SubType
find-output
Rule
×2
Input
6
Output
12
Difficulty
starter