9621 /www/nrich/html/content/id/9621/ 10 2012-11-15T13:51:23 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><br></br></mdoxml> <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><p>Many numbers can be expressed as the sum of two or more consecutive integers.<br></br> <br></br> 15 = 7+8<br></br> <br></br> 10 = 1+2+3+4<br></br>  </p> <p>What can you say about numbers which can be expressed in this way? </p> <p>Try to prove your statements.</p></mdoxml> 2 3 0 0 0 0 0