If 6 $ 2 = 20 and 4 $ 3 = 19, then 5 $ 2 = ?
2025
If 6 $ 2 = 20 and 4 $ 3 = 19, then 5 $ 2 = ?
- A.
18
- B.
17
- C.
16
- D.
15
Attempted by 16 students.
Show answer & explanation
Correct answer: B
The operation follows a $ b = a x (b + 1) + b. Thus 6 $ 2 = 6 x 3 + 2 = 20 and 4 $ 3 = 4 x 4 + 3 = 19. Therefore 5 $ 2 = 5 x 3 + 2 = 17.