Question

Which number should be added to $195$ so that it becomes prime?

Answer 1

Determine the number that should be added to $195$ so that it becomes prime.

A prime number is a whole number greater than $1$whose only factors are $1$and itself.

So, $195$ is divisible by $5$

$195+1=196$

$196$is divisible by $2$

$195+2=197$

$197$ is divisible by $1$and itself only. So, it is a prime number.

Hence, $2$ should be added to $195$ so that it becomes prime that is $\mathbf{“}\mathbf{197}\mathbf{”}$.