Question

if x is a prime number, then x+1 is not a prime number. A counterexample is x=

Answer 1

3 is what I think the answer would be. 3 + 1 is 4, 4 is not a prime number, 3 is prime.

Answer 2

Answer:  The required example is x = 5.

Step-by-step explanation:  Given that if x is a prime nu mber, then x+1 is not a prime number.

We are to give a counterexample for this.

Let us consider that

$x=5.$

Then, we know that x is a prime number.

But, we get

$x+1=5+1=6,$ which is not a prime number.

Thus, the required example is x = 5.