Rather than generalizing ability to "Math" as a whole, I think it might be more meaningful to state that individuals may differ in the type of problem solving t

Rather than generalizing ability to "Math" as a whole, I think it might be more meaningful to state that individuals may differ in the type of problem solving their brain is better at (or at least they enjoy more and thus with effort get better at it). Enjoying and being good at abstract mathematical concepts of sets and number theory might be different than being good at geometrical manipulations or calculus. Some capabilities required for certain types of math problems might cluster closer with problem solving capabilities in other domains (e.g. chemistry or computer science or even writing) than they do other capabilities in math.