There’s actually many variation of those Peter and Simon/Sally problems. I’ve seen with two, three and up to four numbers. Often, one of them claim they (finall

There’s actually many variation of those Peter and Simon/Sally problems. I’ve seen with two, three and up to four numbers. Often, one of them claim they (finally) know the answer after a certain number of interactions and _then_ the other claiming that they either can, or can’t figure it out. “I knew that” or “Oh, really?” respond the one who knows, and finally: “Then I know what those are.” One can include certain clues, like “Those are three beautiful numbers” to indicate those are different, or “You would like them” if either of them is presented as a fan of prime numbers, perfect numbers or something like that. With children’s age, they might be in school, boarding school, went to university, or have children, to indicate they are below or above 6, 14, 18, etc.