Question

If 5 @ 3 = 28 and 4 @ 2 = 18, then what is 6 @ 4?

• A. 40
• B. 52
• C. 64
• D. 76

Answer 1

Answer:

A. 40

Observe the pattern:

$5 @ 3 = 5^2 + 3 = 25 + 3 = 28$
$4 @ 2 = 4^2 + 2 = 16 + 2 = 18$

So,

$a @ b = a^2 + b$

Now calculate:

$6 @ 4 = 6^2 + 4 = 36 + 4 = 40$

Therefore,

$\boxed{40}$