Fake or Misprinted Trivial Pursuit Cards, Rare?

Hello,
We have the 1981 Masters #7 game with a lot of question cards where the answer is completely wrong (often not even relevant to the question).
These questions correspond to other cards, as the misprinted cards have a different number on the back than the front. Many of the card numbers have a "0" or "8" on them.
Does anyone have any information about misprinted question cards? I have been unable to find any information online about this strange misprint. Could this potentially be worth something? I will put up pictures if this is not a common occurrence.
Maybe you collectors can shed some light on this, as I am very new to collecting.
Thank you,
B.