I'm 50. High School was a long time ago. I love Ubuntu, and I love Java (they were looking for people for Enterprise Java tooling), but the inane high school questions were, for me, a strong indicator that "oldies need not apply." Mr Shuttleworth has said - here - that he's confident this set of questions is picking the right people, so I'm taking him at his word and not wasting my time or theirs.
Also foreigners that studied in systems that do not have easy analogue to the American GPA. Also autodidacts. Also people not suffering fools gladly.