I have a dumb question. If I need I pages on my laptop I can't download it from the Apple store online? I have to physically buy the disks?

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No such thing as a dumb question. yes, you can download a demo of iWork then purchase the serial number after you decide if you like it. It works for 30 days I believe starting the first time you open either of the 3 applications: Keynote, Pages, or Numbers.

Apple - iWork - Download a 30-day trial of iWork.