I must have gotten at least 10 upvotes in the last three weeks. Could it be a group of friends that told each other about the question? Since it is a recreational math problem, might there have been a teacher who told their students about it?

As I point out in my answer, I did not think of the solution on my own, but I think it is kind of interesting, and allows for the problem to be generalized. You can go here to see the problem and answer I gave (my answer is second, with 25 upvotes). You can link to the other answers. One of them is from ChatGPT, which got it all wrong.