In Hungary students are rated from 1 to 5, where 5 is the best score and 1 is the worst. During the semester you have multiple tests (both verbal and on paper) each giving you a score between 1 and 5. Your final score is the average of these rounded to an integer. These final scores are the only important measure when you apply to study further, nothing else matters.
I had a [5,5,5] and had to take a verbal test which I didn't prepare for. My biology teacher decided to rate it as "three fourth" and logged it as "3/4". [despite being horribly wrong it was commonly understood that it actually means "between 3 and 4"]
However...
At the end of the semester she calculated my score as:
(5+5+5+3+4)/5 = 4.4 -> 4
instead of
(5+5+5+3.5)/4 = 4.6 -> 5
Imagine a 13 year old student arguing a 50 year old biology teacher in front of the whole class about how to calculate my score properly. I even tried to convince her to downgrade my "3/4" to a "3" and recalc my score (that would yield 4.5) She didn't listen, eventually I was thrown out of the classroom and finished the year with a 4, because of a math error.
Edit: This was long time ago, so I am almost sure the exact numbers are off, but I clearly remember the broken math and the result.