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新gre考试实施以来，不仅对写作部分茫然不知所措，就连我们所擅长的数学也甚是担忧，相信这其中的原因还是由于考生在新gre数学复习时没有把基础打牢。如果新版gre数学基本考点都没有复习到，如何能拿到分数呢?所以说，想要新版gre数学考好，复习的时候一定要把基本概念和重要考点都弄扎实。 Set A set is a collection of objects or things. Each object in a set a member or element of that set.Size of a set is the number of members in the set. Example: The set of even numbers between 2 and 10 is of size 5:{2,4,6,8,10}. The set of primes between 2 and 10 is of size 4:{2,3,5,7}. Remember: Each member of set A belongs to A or is in the set A. A set can not have repeating member:{1,3,1,2}is not a set. Rearranging the order of the members does not change the set:{1,2,3}is same as{3,2,1}. Combinations Number of ways we can select n objects from a group of m distinct objects is m!/!). Example: Number of possible ways to pick 4 oscar nominations from a list of 50 movies is 50!/!)=50!/=50494847/24=230300. Remember: This does not apply if there are identical objects. | 
