look at his groupings of pages :
RewriteRule news$ /news.php [NC,QSA]
RewriteRule tools$ /tools.php [NC,QSA]
RewriteRule projects$ /projects.php [NC,QSA]
RewriteRule cv$ /cv.php [NC,QSA]
RewriteRule skills$ /skills.php [NC,QSA]
RewriteRule experience$ /experience.php [NC,QSA]
RewriteRule contact$ /contact.php [NC,QSA]
RewriteRule bmi$ /bmi.php [NC,QSA]
RewriteRule myip$ /myip.php [NC,QSA]
RewriteRule browser$ /browser.php [NC,QSA]
RewriteRule speed$ /speed.php [NC,QSA]
a number alone will not split page addresses to all his categories
- unless everything is in one master table, hence "probably"