This test has at least 3 flaws. 2 of the questions are written badly. They demanded cultural knowledge - one was "Aztecs are to Mexico as Incas are to what?" The other involved knowing that Paris was a city. I got both of these questions right, but they both shouldn't be on an IQ test. They make it unfair for someone from a non-Western background who wouldn't be expected to name European capitals or Mesoamerican empires.
It's not as bad as those old IQ tests which had questions like "Christy Mathewson is famous as a:
A)writer
B)artist
C)baseball player
D)comedian
Secondly, I answered the first 28 questions right before I ran out of time. An IQ test is only as smart as the smartest person who writes it. In this instance, the test would have no way of distinguishing between me or Stephen Hawking. In fact, it might give me a higher score, because I'm younger.
Example: My General Knowledge score was 100%, which puts me on the 90th percentile. 10% of people taking this test are too smart for the test to correctly grade them in this category!
Thirdly, it was timed, which isn't fair to people like me and isn't considered proper IQ testing procedure. Intelligence quotient and processing speed are generally considered separate concepts, and should be tested in a way that separates both. According to the formal IQ test I took a few years ago (which was more than just multiple choice), my IQ is on the 99th percentile (about 150) but my processing speed is on the 22nd percentile (in IQ terms, that'd be about a 75).