Hide pages

The template tag, wp_list_pages(), is typically used by theme designers to display Pages in a nav bar. With the help of the Template Hierarchy article, determine what Template is displaying your Pages (probably header.php), then look for wp_list_pages and use an exclude=x or include=x to limit the Pages displayed.

You can use the Pages widget that allows you to sort pages by title, order or page ID and HIDE them as well. Add the widget to your sidebar.