Question #13 on the Arithmetic Progress Quiz #6 in "im overwhelmed study guide"

On Arithmetic Progress Quiz #6, the solution and answer guide say that 0 counts as a positive integer to include in your test on question #13

But in the “zero is strange” video, we are taught that zero is not a positive or negative integer… so I am confused why you would be able to use it in this question as n….

thanks in advance

In the solution we put 0 into the box, but notice that n is still 3 which is positive.