You may submit a solution in one of the following ways:

Solutions are due at noon on Friday; late solutions will not be accepted.  All submissions will be reviewed and a winner will be selected over the weekend.  A correct solution and the winner's name will then be posted on the web page. 

Solutions should be complete and sufficient explanation and reasoning should be provided.
Please note: The e-mail address has been having problems for the last month. These now appear to have been resolved. I have only received some of the messages from the last month today (Feb. 3rd). The list of winners has been updated to reflect past winners whose solutions were not received on time because of these technical problems.