The title is based on this Reddit post:
It's 1:30am so I'm not going to go dig up the study, but what it showed was that, on average, a person who performs well in mathematics usually performs better in other subjects compared to people who do not perform well in mathematics. The conclusion of the study was that someone who excels at mathematics, pretty much can excel at everything else. Anecdotally, I'm sure many people can confirm this as well.