Ruby Quiz 3 is still very much under construction. The dust should settle within a couple of weeks. Quizzes 157-188 were originally posted by Matthew Moss, unless otherwise indicated, and are reposted here with permission.
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Interested in the book?
A selection of the original quizzes by James Edward Gray II.
The Ruby Quiz 3 site is maintained by STRd6
Source code for this web application can be found on Google Code