EDDDITTT: Question: May I please be forgiven for telling this demon spawn to post his question on MSE?
EDIT:Apparently I made one of the possible correct calls. The 16 year old erased the contents of his MO question, about 37 minutes ago at this edit (they were restored). So this is more a question of cheating on some project or contest than actual curiosity. I shouldn't imagine he will post anything on MSE. I was not sure, I just did not want to spend hours writing explanations to a kid.
Email to me and then my reply:
Hey! :) U have answered my question in this topic : http://mathoverflow.net/questions/115193/can-be-any-number But i don't really get your solution :( I'm only 16, could you explain to me your solution as elementary as you can?
Hello, still entirely nameless person. I think the most responsible thing I can do is to encourage you to register on MSE and post your question again as one of: http://math.stackexchange.com/questions?sort=newest You should include a link to the original question on MO. You should also explain your age and how, exactly, you came to be considering this problem. Emphasize that you are looking for more detail at an elementary level. There are plenty of professors and high school teachers who have a good deal of experience explaining things at your level. Say something about how your own mathematics teacher is unable to explain this.
This way, you are likely to get several good answers, and you can still request more detail.