[10xDev]

I don't believe there is a special part of your brain that allows you to be good at say chess, but leaves you with no potential in football (soccer). Of course some people are naturally faster than others or have a higher endurance peak but anything that involves working with your mind comes down to working memory (incredibly important), long term memory and spatial reasoning. That's why you will often see people talented at one thing change careers and still be successful. A good example is a Norwegian grandmaster who was also a national team football player: https://en.wikipedia.org/wiki/Simen_Agdestein

[threatofrain]

Also having good grades in math predicts having good grades across the board, including English.