TBH, I honestly don't know how representative of overall situation my own experience was, but personally, when I was 14, I was solving this (https://gitorious.org/studies-maths-science/maths57d00/raw/5... — I think you can determine overall math level without knowing Russian, just by reading math notation part of the tasks), and I doubt that overall level could be really different. I hear a lot of bad things about education system in Russia lately though, so it could get much worse.