I also looked at https://www.avrfreaks.net/index.p... ("AVR Quiz") but started a new thread, because it's so old...
First of all, it's very entertaining to have a quiz on this website.
Is there somewhere any information, where the correct answers are explained (maybe discussed)?
Specifically, I found the question:
"What is the longest delay you can get between timer overflows with a free running timer in a ATmega?"
I would say, that this depends on the clock source which can be an arbitrary small frequency!
So, I would be insterested how the correct answer was thought...