Number on Pages

The only way I can think of to get the slide numbering the way you want it is to split the file into more than one file.

That way you could have:
Presentation 1 with numbers 1 and 2 on the first two slides, then no numbering on slides 3 and 4.
Presentation 2 with the first three slides numbered 4, 5, 6 by going into File - Page Setup and setting Number slide from: to 3
and so on.

So every time you want to start numbering again from a different number other than 1, you would need to put those slides into a new presentation.

To run the presentations together when presenting, you would need to have a hyperlink from the first presentation to open the second presentation, a hyperlink from the second presentation to open the third and so on.

As far as printing is concerned, I would send each presentation to Word, then you could put the slides together into one Word document.

It's a bit messy but it's the only way I can think of to do this.

Kind regards
Amanda