If 3 @ 2 = 7
6 @ 3 = 21
8 @ 2 = 22
Then 5@4=?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 21.
Logic: a @ b = (a × b) + (a - b)
3 @ 2 → (3 × 2) + (3 - 2) = 6 + 1 = 7
6 @ 3 → (6 × 3) + (6 - 3) = 18 + 3 = 21
8 @ 2 → (8 × 2) + (8 - 2) = 16 + 6 = 22
Similarly, 5 @ 4 → (5 × 4) + (5 - 4) = 20 + 1 = 21