Restrict Search results not to Show custom Pages

Hi,

I have 10 Pages . The pages are like this :

http://site/file/Pages/abc-thank-you.aspx

http://site/file/Pages/cod-thank-you.aspx

http://site/gog/Pages/ghf-thank-you.aspx

http://site/file/Pagesdiv-thank-you.html

I don't want these pages to appear in search results. I am thinking Crawl rule regex should work. I have tried lots of combinations but none of them work.Please help