<?xml version="1.0" encoding="UTF-8"?>
<!-- Pages served at 4ab.in but stored in the exam.4ab.in docroot (vhost contexts and a
     rewrite), so the nightly walk of the 4ab.in tree never sees them. Listed by hand.
     Only indexable URLs belong here: /symmetry/ and the two /tools/ mirrors are
     deliberately noindex and are therefore left out.

     lastmod added 2026-09-20. Google retired the sitemap ping endpoint in June 2023
     (it now answers 404) and said lastmod is what it reads instead, so a sitemap
     without it gives Google nothing to act on. Each date below is the page's real
     modification time: three from the file on disk, question-bank from its
     Last-Modified header, since that URL is served through a rewrite and has no
     file of its own in this tree. They are not set to today to look fresh, because
     a lastmod that lies stops being trusted once Google notices. changefreq and
     priority are kept only because they are harmless; Google ignores both.

     Note for whoever edits this next: a double hyphen is illegal inside an XML
     comment. Writing one here made the whole sitemap unparseable, which a browser
     hides and Google does not. -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url><loc>https://4ab.in/question-bank/</loc><lastmod>2026-09-19</lastmod><changefreq>weekly</changefreq><priority>0.8</priority></url>
  <url><loc>https://4ab.in/app/topic.html</loc><lastmod>2026-09-19</lastmod><changefreq>monthly</changefreq><priority>0.5</priority></url>
  <url><loc>https://4ab.in/app/analyse.html</loc><lastmod>2026-09-19</lastmod><changefreq>monthly</changefreq><priority>0.5</priority></url>
  <url><loc>https://4ab.in/whiteboard/</loc><lastmod>2026-09-19</lastmod><changefreq>monthly</changefreq><priority>0.5</priority></url>
</urlset>
