No, he dropped out after one semester. Regardless, my point still stands because he lacks even undergraduate training in math, and yet he outscored all PhDs in math who took the test, which is prima fasce evidence that training in mathematics does not correlate with IQ test performance.
SUCKMYMUSCLE
Debussey does not agree completely. Remember, 40 - 80% of IQ is probably genetic in nature, and 20% related to "teh environment". Doing math give you some training in analyzing problems and planning a solution which could translate into a few % quicker thinking + better concentration when being faced with problems one does not have much knowledge about on beforehand. (thus scoring better on "speed IQ tests").
Thus, doing a ton of math might help you gain a point or 3 on your IQ score, thus a small correlation might exist (although this is somewhat speculative on Debusseys part). Fuck, a lot of different things have correlated with boosting your IQ score somewhat, like short term memory training for example, and other mental exercises.
Addition: Even having done a lot of mental aritmetic will probably give you a slight advantage on the number sequences due to being able to analyze the number sequences a bit quicker. The correlation might not be strong, but its at least not something one can rule out (unless you have some research on this)
At the same time, Chris Langan beat those PH.D's because he flat out has better genes for brainpower than them. At the same time, Langan has taught himself advanced mathematics and other other advanced academic disciplines without going to college/university, so it is not like he does not have a lot experience with math and other academic areas although he = missing the "formal training". (Attending class is a waste of time anyway, you can learn pretty much anything much quicker by yourself than listening to some slow ass teacher mumbling for 2 hours about something you can grasp within 10 minutes on your own).