I seem to remember there used to be one that MJD ran
See http://perl.plover.com/qotw/. Just working through the old quizzes could be a lot of fun. In addition to the ones listed on the website, there were a few posted on the mailing list.

In reply to Re^3: Perl Competitions and Addition to PM system by ysth
in thread Perl Competitions and Addition to PM system by zer

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