Question

$x_1,x_2,x_3,........,x_{10}$ are integers, none of which are divisible by $3$. The remainder when $x_1^2+x_2^2+x_3^2+......+x_{10}^2$ is divided by $3$ is:

• A. $0$
• B. $0$ or $2$
• C. $1$ or $2$
• D. $1$

Answer 1

The correct option is D $1$