数基本概念
整数 integers, whole numbers
正数 positive numbers
负数 negative numbers
奇数 odd numbers
偶数 even numbers
质数 prime numbers
合数 composite numbers
知识点:
2是最小的质数,也是唯一的偶质数
0,1非质非合
质数没有负数
例题:
1.如果Q是一个大于11的质数,并且Q是两个质数A和B之和,A可以是下列哪一个?
A.2
B.5
C.7
D.9
E.13
2.一个正好有两个大于1的不同因数的正整数必然是:
A.一个质数
B.一个偶数
C.3的倍数
D.质数的平方
E.奇数的平方
平时,建议大家一定要注意GRE数学基本概念的加强理解,因为无论GRE数学考试怎样的题目都是从最基本的概念中演变而来的。
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