I recently did so on mathematics site, and, someone kindly commented: "why do you ask if you know?".
I am rather new here and I certainly try to behave like a good citizen. In fact, I asked the question only to contribute to this great mathematics site with a recreational humble own brew mathematical puzzle, and, agreed, the mathematical question was written as puzzle.
I was kindly suggested to perhaps ask the question on the puzzle site instead. However, maybe someone will rightly react same way as on mathematics site ... or do different sites have different etiquette ?
"can one (yes/no) ask a question one came up with oneself and one knows the answer to?"
I sincerely want to avoid bad practice on mathematics site and on other sites.
Have a nice day