How many of you passed all your written exams on the first try?
I did. IIRC the pass mark was 70% at the time? - I remember thinking "if there are really people flying around who could only manage to get 70% on that exam then I hope they keep well out of my way".
Dunno what you had in Germany, but here in 1989 we had multiple choice questions many of which could be got right by common sense (and O level vectors and trig and other stuff you hadn't had to learn specially for flying), so to guess your way to 70% on the balance you'd need luck, but not outrageous luck.