How do I hide page numbers at any place in the document?

[Laurent]

I am putting a book together, and would like to have the left pages at the
end of the chapters without a number.
Each chapter is separated by a page break.

 

[Suzanne S. Barnhill]

In order to leave the pages blank, you'll need to insert a section break and
delete the page numbers in the header/footer of the new section (after
unlinking it). See http://sbarnhill.mvps.org/WordFAQs/HeaderFooter.htm