I'm sure I'm overthinking it, but how exactly is it even possible to place in the top 10 students? There are fewer points available than the number of students taking the test, so many students will tie for each possible score. Top 1% I can understand, but top 10 individuals? Assuming a standard deviation of scores, most of them will be in the middle, but I'm sure more than 10 out of a quarter million students would score full points.