How to subtract Survey questions from the total number of questions in a quiz?

I have 10 quiz questions in my question pool, and I use the "Question X of Y" dynamic text box to title each question:

This approached worked well until my client requested I add 3 survey questions to the end of the course. Apparently, Captivate includes the 3 survey questions in the total number of quiz questions even though my survey questions ARE NOT part of the question pool.

Now, when the user is taking the quiz, they see the title "Question 1 of 13", rather than "Question 1 of 10". So they think they are going to have to answer 13 quiz questions rather than 10. The only work around I have found is to remove the "Question X of Y" text box from the slide, but then the user has no indication of what question they are on nor how many questions are left. Surely someone else has experienced the same problem and found a solution? Help!