I know u r wrong AADI, becasue I know indians are not the best. In fact no particular race is the best at math, mathematics is a complex system that was crafted and created by pretty much everyone.
Thus, the logic behind it goes back to ancient history, before the Indians and far before the koreans. I used to think like that, but then i met smart British people. That changed everything. Its just that they don't show themselves out that much, because a lot of people say that the west lives on stolen money from the east, like the british colonies etc. But that is not true, the people of nobilic birth and understanding still are doing well. The overall students of rich countries show a negative trend, because now education is accessible to everyone. Since the governments of these respective countries like America and Britian have tried to make it available to everyone, the quality has gone down, and now they public schools, apart from a slight few are redundant institutions.
So the people who do well are always a minority because being educated takes time, patience and resilience.
I understand that you may back urself up with stats, but to be honest, its not about statistics, its about the real deal. Like the school i go to is almost the same as urs, they dont teach anything. But, there are private and far more expensive schools for the nobles, or mordernly called the 'rich'. Which will give ppl quality education. See, things really have not changed from mideaval ages, they have become more complex.