I have created a puzzle that includes multiple steps, that I'd like to post on the site. However, two of the steps use standard puzzles as part of making progress.
Assuming I attribute the source, is it fair game for me to find an instance of these standard puzzles on the Internet, or use a puzzle generator, and incorporate that into the larger puzzle?
In my case, I'm looking for puzzles whose answers have particular properties that are not necessarily easy to generate from scratch. Many thanks in advance for any feedback you can provide on this question. I want to be careful not to violate any norms that may not be obvious.