This kind of stuff interests me and I think after taking it and reading about it, it's a good thing to know about yourself. Obviously the test isn't perfect, but I think this is one of the better ones out there.
Another issue with these tests is they idealize the best aspects of sociological personality test to generate clicks.
It's all idealized. I'm far from a mathematician, although I have elements of an analytic mind in other aspects of life, math was actually one of my weaker subjects.
Reading over the summaries for the different outcomes from Lashka's link, I find myself accurately described by both ESFP and ENFP (1% difference between sensing and intuition i felt like both would be worth the read). Really interesting stuff