Question

If p is a prime number and p divides a 2 (where 'a' is a positive integer), thenp divides a. Is it true ?​

Answer 1

Answer:

Therefore, we can say if $p$ divides ${a^2}$ and $p$ divides $a$, then $a$ is a positive integer. Hence, option D is correct. Note: A number is a prime number if and only if it has only 2 factors, that is 1 and number itself.