93% PhD. But really, I only have a bachelor's in computer science. I doubt that all that is required for a PhD is a collection of random trivia; however, if that's wrong, it explains why I never spent the money to get one. ;)
Seriously though, I think person with the best shot at getting 100% of these correct is someone with a great memory who just finished high school. They're in test mode for the ACT/SAT, they would have more recently been exposed to the literature, history, geography, math, and science trivia, and they would not yet have a specialized focus of learning that happens more and more as education progresses.