who was the 5th president of the u.s please help me

Check this site.

http://americanhistory.about.com/library/fastfacts/blffpres5.htm

The fifth President of the United States was James Monroe. You can easily find this information by doing a quick search using a search engine like Google, or by visiting websites that provide information about U.S. presidents, such as the site you mentioned, http://americanhistory.about.com/library/fastfacts/blffpres5.htm. These resources often have reliable information that is readily accessible and provide concise facts about a wide range of topics, including historical figures like presidents.