How should the CV for the application of a pure math PhD applicant be structured? I currently have four sections: 


Education 
Academic and research experiences 
Honors and Awards 
Work and Volunteer Experience


I have the following questions:


Should I include a section which gives a detailed account for the advanced math courses I have taken?
Should I elaborate on 3 and 4, or do I just list my awards and experience in those sections without explaining anything?
Should I include my research interest and standardized test scores in my CV?
I don't think a "detailed account" is necessary for anything that's a standard part of the math curriculum: a simple list would suffice. (Note that this would also apply to any other discipline with a "standard" curriculum, such as chemistry or physics!)

I would not include research interest and test scores, as they may be "restrictive" and turn off potential readers. (Test scores, if needed, must be provided in a more official way than just a CV listing, so you might as well leave it off.)

As for honors and awards and experience, I'd include specific information if it is relevant to your career aims; otherwise, a simple listing suffices.