Assessment - How do i number them?

Hi there,

I have 3 slides in my storyline assessment .

1. Welcome to the assessment

2. Slide that draws random questions form the question bank

3. Results page

I would like to ask if you could assist me with the following:

I need the questions to indicate x of y on the screen...

I used to have question 1 of 10, then 2 of 10 etc, on the slides, when I had them appear in a sequential manner, but because I am drawing them randomly now, I need to find a dynamic way of showing the user where he is in the assessment, for example, question 3 of 10...

Could you please point in the right direction?

Thank you