hard Set 42 Form Exercise

? → [+10] → 12

Show answer

Answer: 2

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

Input: 7 → [?] → 15, what is the rule?

Show answer

Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
7
Output
15
Difficulty
hard

? → [×5] → 25

Show answer

Answer: 5

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

Input: 2 → [×2] → ?

Show answer

Answer: 4

SubType
find-output
Rule
×2
Input
2
Output
4
Difficulty
hard

Input: 5 → [-3] → ?

Show answer

Answer: 2

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

Input: 6 → [+2] → ?

Show answer

Answer: 8

SubType
find-output
Rule
+2
Input
6
Output
8
Difficulty
hard

? → [+4 ×2] → 12

Show answer

Answer: 2

SubType
find-input
Rule
+4 ×2
Input
2
Output
12
Difficulty
hard