.htaccess mod_rewrite get variables not working

Hi,
I'm trying to rewrite the urls across a site I'm developing, which pass get variables like the following:
localhost/link/link1/page.php?id=12
would look like:
localhost/page/12

The first link in the htaccess file works fine, but the following ones don't (whatever the order, the first one works). Can anyone tell me why/help me solve it please?

I'm attaching a snippet of the file here:

# http://localhost/html/content_quiz/quiz-results.php?quizid={number}
# to
# http://localhost/results/quiz/{number}
RewriteRule ^results/quiz/([0-9]+)/?$ /html/content_quiz/quiz-results.php?quizid=$2 [NC,L]

# http://localhost/html/content_pages/results.php
# to
# http://localhost/results
RewriteRule ^results/?$ /html/content_pages/results.php [NC,L]

# http://localhost/html/content_quiz/grade.php?quizid={number}
# to
# http://localhost/quiz/{number}/grade
RewriteRule ^quiz/([0-9]+)/grade/?$ /html/content_quiz/grade.php?quizid=$3 [NC,L]

Code (markup):

At the moment, it goes up to $6, but more will be added later on in development.

 

I managed to get it working. It seems that I needed to leave $1 for all of them. I guess it's because it only executed the one line before ending?