expert Set 99 Form Exercise

Input: 7 → [+2] → ?

Show answer

Answer: 9

SubType
find-output
Rule
+2
Input
7
Output
9
Difficulty
expert

? → [×5] → 20

Show answer

Answer: 4

SubType
find-input
Rule
×5
Input
4
Output
20
Difficulty
expert

? → [×2] → 20

Show answer

Answer: 10

SubType
find-input
Rule
×2
Input
10
Output
20
Difficulty
expert

Input: 9 → [?] → 21, what is the rule?

Show answer

Answer: ×2 + 3

SubType
find-rule
Rule
×2 + 3
Input
9
Output
21
Difficulty
expert

Input: 9 → [+2] → ?

Show answer

Answer: 11

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

Input: 5 → [+10] → ?

Show answer

Answer: 15

SubType
find-output
Rule
+10
Input
5
Output
15
Difficulty
expert

? → [×2 + 1] → 17

Show answer

Answer: 8

SubType
find-input
Rule
×2 + 1
Input
8
Output
17
Difficulty
expert

Input: 9 → [?] → 27, what is the rule?

Show answer

Answer: ×3

SubType
find-rule
Rule
×3
Input
9
Output
27
Difficulty
expert