Question

If the number $653$ $xy$ is divisible by $90$, then $(x+y)=$?

• A. $2$
• B. $3$
• C. $4$
• D. $6$

Answer 1

The correct option is C $4$

$90=10\times 9$
Clearly, $653$ $xy$ is divisible by $10$, so $y=0$

Now, $653x0$ is divisible by $9$
So, $(6+5+3+x+0)=(14+x)$ is divisible by $9$.

So, $x=4$

Hence, $(x+y)=(4+0)=4$.