medium Set 99 Form Exercise

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

Show answer

Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
9
Output
19
Difficulty
medium

? → [×3] → 18

Show answer

Answer: 6

SubType
find-input
Rule
×3
Input
6
Output
18
Difficulty
medium

? → [-3] → 4

Show answer

Answer: 7

SubType
find-input
Rule
-3
Input
7
Output
4
Difficulty
medium

Input: 6 → [?] → 13, what is the rule?

Show answer

Answer: ×2 + 1

SubType
find-rule
Rule
×2 + 1
Input
6
Output
13
Difficulty
medium

? → [×3 - 2] → 4

Show answer

Answer: 2

SubType
find-input
Rule
×3 - 2
Input
2
Output
4
Difficulty
medium

Input: 9 → [×3 - 2] → ?

Show answer

Answer: 25

SubType
find-output
Rule
×3 - 2
Input
9
Output
25
Difficulty
medium

Input: 6 → [×2 + 3] → ?

Show answer

Answer: 15

SubType
find-output
Rule
×2 + 3
Input
6
Output
15
Difficulty
medium

Input: 7 → [?] → 4, what is the rule?

Show answer

Answer: -3

SubType
find-rule
Rule
-3
Input
7
Output
4
Difficulty
medium