I got a 7/10 as well. On all three of the ones I got wrong, I was borderline, mostly because the sample image was so small and at such poor resolution. I was very proud of myself for correctly identifying one photo because of the noise banding. There were a couple, however, where the focus just looked bad all over, and I basically just guessed there.
So I went instead to find solace in that I can still ace every natural vs silicone test (NSFW by any means: gratuitous boobage). I’ve taken about eight of these now with 10-20 boobs per quiz and still have a perfect score. I heart boobs.