The "are you from this dimension?" question will always be incorrect. So don't fret not getting all 12 questions right. As a math nerd I really enjoyed the concept, but you need to give people more time to finish reading the important note. Unfortunately there is a surprising lack of math in this exam and some answers like the "are you grateful" question or the "what the dog doin" question have no in game hints. Overall it was more fun than most math tests.
Fair criticism, if it was up to me I would have the test be more maths based, but I was trying to think about the average person, and I don't think the average person wants to do too much maths. And I didn't notice that you can't get question 7 right! Surely enough I just checked and I put the wrong answer index, so if there was a sixth option that would have been correct. Anyway, thanks for the feedback!