This month's problem set: http://rubyquiz.com/quiz61.html
Since rubyquiz is down: http://web.archive.org/web/20130215052933/http://rubyquiz.com/quiz61.html
Also, from @JEG2 (http://twitter.com/JEG2): https://gist.github.com/JEG2/5197937
Try not to read the submitted answers to this rubyquiz problem set or the writeup under "Quiz Summary" -- try to solve the quiz on your own before reviewing the solutions.
Code will be due on: *March 21* to give us a week to review before the meetup on *March 28*