Yeah, I did try applying to them a year or so ago and got a lot of those questions too. The really weird thing to me (and what confuses me) is why exactly they want these questions? How exactly is someone supposed to share their "rationale or evidence for the high school performance selections above" when the "grades" for maths/native language is decided by the institution/teacher doing the grading and not by the student? And, even better: why exactly does Canonical need this information at all? I'm pretty sure that it's well-understood that your grades in high school (let alone college) say absolutely nothing about you today. And there are many, many, many reasons why someone in HS or college might perform poorly but in actuality they're brilliant and very capable.