underglass - 12:32 am on Oct 24, 2009 (gmt 0)

Can someone answer this for me? I need help. I have duplicate title problems and I need to block them using a robots.txt.

www.mystore.com/blue-widgets/2/

and then there are up to 142 other titles just like it.

How can I block or disallow this in robots.txt without blocking the directory/files and without having to use every number to up to 142?

Thank you!