Perhaps this could be in a different thread, but I expect it will have a factual answer.
I remember there are often questions about Ice cube stalagmites, or circular patterns caused by pivot irrigation; or maybe the nefarious -gry question.
Which specific topic seems to be asked the most on GQ?
General questions like something about computers wouldn’t count; but specific questions like “why have I lost color on my monitor?” would.
I hesitate to specifically name the question I’m thinking of, lest it inspire the topic to arise again, but I suspect that the most-asked question is a particular query involving the sum of an infinite series, and a resulting degeneracy in representation in place-value systems of notation of real numbers.
Threads along the lines of “aren’t identical twins just one person really?” (i.e. is it OK to marry them both, or if one has sex with the other, is it masturbation?) - seem fairly common.