This is strange. I set up auto page numbering on the master pages and the document pages display the page numbers correctly. But later on I thought the page numbers were too large so I went to the master pages to change the size and there's nothing. Thinking the page numbers were hidden from view or somehow were white in color (i.e, they were there but weren't being displayed) I chose Select All but still nothing.
Do you have more than one master?
You're a genius. Happy Thanksgiving.