When it comes to math, the stereotype is that all Asians are good at it. I don't know about anywhere else, but in China, students are learning algebra in elementary school. When they are compared to students in the U.S., they seem to be smarter or better in math. If that is the case, it's only because the Chinese have an early start.
Personally, I'm not good at math. But if I'm solving some equation problems with some dropout high school students, I may look smart.
I thought about this when I'd heard two non-English-speaking Chinese comment on how simple algebra is when the GED teacher asked them to solve some problems.