I remember when I got 69/70 in English in my 10th Final Board Exams (Semester II) and didn't cared a ---- about it. Theoretical knowledge is not going to help unless and until you can actually make use of it practically. My English is still crap and I need to learn a lot yet. It's not easy journey. Marks never show the real knowledge. Numbers aren't gonna help if you can't explain practically. You won't know the exact existence of something if you won't discover it. Your knowledge will be tested in future. That said, Asian countries don't care about knowledge, all they want is marks no matter how they come, probably the reason we don't have grading system. It's waste anyway so why I am even writing this post.