When making a simple calculated simple quiz question. I had two wild cards {a} and {b}, both of which are exponents.
After generating whole numebrs for for both wildcards (both between 2 and 9) it works perfectly the first time I preview the quiz. Although, as I refresh the page multiple times (or try the quiz multiple times) I have found that eventually one (or both) of my wildcards will say 10 and when I go to edit the question I have found that the parameters for the wildcards have been reset to the default.