You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20150213153952" timestamp="2015-02-13T15:39:52Z" ns="0" title="Motivation for topology" />
        <page value="20150213183521" timestamp="2015-02-13T18:35:21Z" ns="0" title="Nabla" />
        <page value="20150228230358" timestamp="2015-02-28T23:03:58Z" ns="0" title="Motivation for set theory axioms" />
        <page value="20150308165804" timestamp="2015-03-08T16:58:04Z" ns="0" title="Linear Algebra" />
        <page value="20150309002026" timestamp="2015-03-09T00:20:26Z" ns="0" title="Closure, interior and boundary" />
        <page value="20150309163531" timestamp="2015-03-09T16:35:31Z" ns="0" title="Formal logic language" />
        <page value="20150311102528" timestamp="2015-03-11T10:25:28Z" ns="0" title="Set theory axioms" />
        <page value="20150312102507" timestamp="2015-03-12T10:25:07Z" ns="0" title="Cardinality" />
        <page value="20150312134548" timestamp="2015-03-12T13:45:48Z" ns="0" title="Jacobian" />
        <page value="20150312135310" timestamp="2015-03-12T13:53:10Z" ns="0" title="Matrix" />
      </results>
    </querypage>
  </query>
</api>