Largest Three Cities per US State: 132/150
Largest Three Cities per Canadian Province or Territory: 19/39
Largest Cities of California: 80/200
Largest Five Cities per Decade in US History: 115/115
Olympic Host Cities: 31/49 
MIT Majors: 32/32 
 The amount I actually know is slightly lower than listed here, as a few I got on the quiz by accident.
 Note the lack of a “Provinces of China” here. You probably know why.
 Note that the flags have state names that are on flags redacted. If it weren’t for those, then my performance would be slightly higher.
 Since 2012, this is the lowest percentage-wise that it has been for me since 2003, as I have never bothered to remember flerovium. Darn.
 Note that some constellations that have named brightest stars are not included in this quiz, for instance Libra (with brightest star Zubeneschamali).
 Note that I have never owned a Pokémon game (although I have played a bit of a Generation II game on someone else’s game boy), and have never read a Harry Potter book.
 As you can see, I am doing rather well at pretending that nothing beyond Generation IV in Pokémon exists.
 Note that some majors that exist at MIT are not in the quiz, like WGS (Women and Gender Studies), and of course Course 19.