Wow, lots of followers today!
If you are interested in any of my coding challenges they should all be tagged with : #toyprogrammingchallenge
If you put that in your search and scroll to to bottom you will see my original proposal. Here is a link with the explanation of where my head is at. The ones I post that I call freebies, are from a subscription to Job Interview problems, and they should be a little tricky, but are usually rated as easy, medium or hard.