I think it depends on how you formatted your pages. I used page breaks between each question so it was a bit cleaner but definitely more than 6 pages. As a reference (because my word count was pretty much exactly the suggested allotment), 750 words is about 2.25-2.5 pages (TNR, 12pt), 450 words is about 1.5 pages, and 300 words is about 1 page and like 2-3 sentences on the following one.
To be honest, I don't remember the last time I had to double space something (maybe college..?)
The rule i"ve been hearing most is +/- 5%. 10% is stretching it but most professionals would suggest the 5% rule to be safe.