Wow, this is some great discussion! Both piano and guitar chords are
fine, some of the benefits on these broader quizzes are seeing
alternative solutions and understanding the problem from different
angles. Likewise the discussions about the differences between
classical and jazz are also welcome. After all, the most important
part of any programming project is understanding the domain.

This writeup is going to be a fun one. Keep the solutions and the
discussion coming!

-- 
-Daniel
http://rubyquiz.strd6.com