Question

If a whole number $n$ is divided by $4$, we will get $3$ as remainder. What will be the remainder if $2n$ is divided by $4$?

• A. $2$
• B. $3$
• C. $4$
• D. None of these

Answer 1

The correct option is A $2$

$\Rightarrow$ Let $n=4\times q+3.$

$\Rightarrow$ Then, $2\times n=8\times q+6=4(2\times q+1)+2.$

$\Rightarrow$ Thus when $2n$ is divided by $4$, the reminder is $2$.