There actually was not a single K-type question in my Naplex. Instead, they had a lot of calculation questions with empty boxes that I had to fill in.
So, either you know how to do the calculation to fill in the empty box or you can't. There is not guessing or work back up to get answer from the choices. Most of calculation questions that I had were to fill in empty boxes.
Oh well, I am done with Naplex with 129. Good luck to you.