Question

The difference between two numbers is $7$ and their sum is $35$. What will be their product?

• A. $324$
• B. $294$
• C. $79$
• D. $245$

Answer 1

The correct option is B $294$

$x+y=35$
$x-y=7$

Add both the equations
$\Rightarrow$$2x=42$ $\Rightarrow$ $x=21$
$\therefore$ $21+y=35$ $\Rightarrow$ $y=14$

$\therefore$ $x$ $\times$ $y=21$ $\times$ $14=294$