I have no finance background but have been reading bogleheads.org for years now. I got 7 of 7. Many of these Qs & concepts are pretty basic.
It reminds me of when I was taking a statistics for sociology course in college and had to teach a classmate how fractions and percentages were related. I tutored her and another kid in the class and we all got As and she understood statistics after better, as well as fractions & percentages.
Calculators can be dangerous as people can use them and not understand what the numbers they are entering or results really mean.