$$\frac{{256 \times 256 - 144 \times 144}}{{112}}$$     is equal to = ?

A. 420

B. 400

C. 360

D. 320

Answer: Option B

Solution(By Examveda Team)

$$\eqalign{ & \frac{{256 \times 256 - 144 \times 144}}{{112}} \cr & = \frac{{{{\left( {256} \right)}^2} - {{\left( {144} \right)}^2}}}{{112}} \cr & = \frac{{\left( {112} \right)\left( {400} \right)}}{{112}} \cr & = 400 \cr} $$