>It's typically 150 hours per class and it's not something you do after coming exhausted home from work either. Assuming you can only invest, lets say, 5 hours

>It's typically 150 hours per class and it's not something you do after coming exhausted home from work either. Assuming you can only invest, lets say, 5 hours on the weekend, it will be 30 weeks per class, summing up to ~1.5 classes per year year. I'd say that if someone can keep that up for 10 years, theirs understanding of math will be far above the average population...