Number properties GMAT strategy guide 
Manhattan GMAT 
 - 4th ed 
 -  MG Prep. Inc  2010 
 - 177 p. : ill. ; 28 cm 
<br/><br/><label>ISBN: </label>9780982423844 
<br/><br/><label>Dewey Class. No.: </label>658.0076 MAN