Board Thread:Support Requests - Getting Technical/@comment-4059089-20140612183120/@comment-452-20140613020232

Template:RandomCategoryDPL

Usage: If you want 3 pages, just use it 3 times in a row.

Edit: You may get repeats, but you said that your category was large, so it shouldn't happen often.

This is as random as you can get with templates, DPL and caching, to get any more random than this, or to ensure that you get 3 different pages, you would have to use javascript to load the list of pages from the category, then pick 3 random ones.