There are no Perfect Nerds.
It’s best not to waste time looking on Google for the answer. In some European and German-speaking countries, students must take a test called the Matura when they finish high school. Almost certainly, they will have to pass that test in order to finish high school. That seems about right, since you had to take two years of a foreign language to graduate from high school where I went.
Either this set of questions was easier than usual, or there were a lot of very smart people in that graduating class who all happened to be in the same group. As a teacher with many years of experience, I can say without a doubt that students with scores of 85 or higher are exceptional. The young woman who recently said she had a 98-grade point average must be feeling very stupid right now.