Geometric reading

I was fixing tags on recent LJ entries (every other web app I’ve used tags with makes them space-separated, not comma-separated) and noticed that I’d mentioned where I was in HBP several times. It got me thinking:

Tuesday I read to page 50.
Wednesday I read to page 200.
Thursday I finished the book, which is about 650 pages.

That’s roughly 50 pages on day one, 150 on day two, and 450 on day three. Fortunately that was enough to finish the book, since I don’t think I would’ve had time to read 1350 pages on Friday!