7799 /www/nrich/html/content/id/7799/ 1 0000-00-00T00:00:00 <mdoxml version="1.0"><p>&quot;These are the live Stage 5 problems which are currently open for solution or comment. Why not submit a solution or comment on any parts that you have done?<br></br>  </p> <br></br> <br></br> <p> </p> <p> </p> <p> </p> <p> </p> <p>&lt;p class=&quot;fo&quot; o&quot;=&quot;&quot;&gt;  </p></mdoxml> 2 3 0 0 0 0 0