Lists and Brain teasers

What is the most common list utilized on the web?

Which tag will add a line break AND additional white space?

Which code will center a heading for our page?

Which type of list will appear on a web page with numbers?

What letter is next in this sequence~ M,A,M,J,J,A,S,O,___?

What tag is used in front of each item that appears in your list?

What letter is next in this sequence O,T,T,F,F,S,S,E,___

What letters will replace file/d/ in our link for images?