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如何备考gmat数学考试，对于很多计划参加gmat考试的人来说，要想在gmat考试中获取好的成绩，gmat数学考试的成败很重要，下面就来看看备考gmat数学考试的时候需要掌握的一些算术知识。 一.整数：integer，whole number 因子：factor or divisor If x and y are integers and x0,x is a divisor of y provided that y=xn for some integer n. In this case y is also said to be divisible by x or to be a multiple of x. For example, 7 is a divisor or factor of 28 since 28=74, but 8 is not a divisor of 28 since there is no integer n such that 28=8n.Divisible adj.可以被整除的 multiple n.倍数 2.商和余数：quotients and remainders 余数和商都可以为0 3.奇数和偶数：odd and even integers 奇数和偶数都可以是负数;零一定是偶数 4.质数和合数：prime numbers and composite numbers A prime number is a positive integer that has exactly two different positive divisors，1 and itself. For example, 2,3,5,7,11, and 13 are prime numbers, but 15 is not, since 15 has four different positive divisors, 1, 3, 5, and 15. The number 1 is not a prime number, since it has only one positive divisor. Every integer greater than 1 is either prime or can be uniquely expressed as a product of prime factors. For example, 14= , 81= , and 484= . | 
