That's not necessarily true. It shows that you are active in thinking and quick to accept new things. Good math for boys doesn't necessarily mean that he is good at liberal arts, while good math for girls means that he may be better and smarter in liberal arts. In short, everyone can learn mathematics well, and the key is whether they can use time to consolidate and innovate. Learning math well is also a skill and smart, but it doesn't mean that you are a person with a heavy heart.