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The Pager control has a property called PagesRange. This property's default value is 10 and the pages would show the first 10 pages, if you have more than 10 pages, and so on. In order to set this to the desired number you will have to use the external template for the News View and set this property to the <telerik:Pager> control. If you do not have the external templates, or you need more information on external templates, please take a look at this article
. Then modify the pager in the ~/Sitefinity/ControlTemplates/News/ListPageMaster.ascx
|<telerik:Pager ID="pager1" runat="server" PagesRange="5">
This should do what you are looking for.
the Telerik team