I find their unfuckable premise to be suspect. Anyone who'd write a quiz in which we get percentage-scores over 100% is not entitled to tell me what to do/not do based on mathematical talent.

The first two evaluation criteria are comparative -- how much are you similar to this other person. The math one is about absolute value, which suggests there is something inherently unsexy about quantitative geeks. I suspect the quiz-makers of bias based on feelings of inadequacy ;)