<p>Use the various <a href="https://stats.stackexchange.com/help/searching">advanced search features</a>.  To find unanswered threads, search for <code>answers:0 closed:no</code>.  Then you can sort by <code>Newest</code>, and skip to the last page (currently <a href="https://stats.stackexchange.com/search?page=1074&amp;tab=Newest&amp;q=answers%3a0%20closed%3ano">1074</a>): the oldest non-closed question without answers appears to be <a href="https://stats.stackexchange.com/questions/2079/whats-good-about-i-projections">What&#39;s good about I-projections?</a> posted on Aug 24, 2010.</p>
