Also, that test is almost entirely culturally driven. The kind of problem is far more common in North America with its standardized testing driven education, t

Also, that test is almost entirely culturally driven. The kind of problem is far more common in North America with its standardized testing driven education, than pretty much anywhere else in the world. I suspect if you asked someone to perform long division, or adding large numbers with decimals and carry overs by hand, instead, the non US countries would perform far better than Americans, who may not even have been taught how to do that.