在做GMAT数学题的时候,会用到很多不同知识点,而这些知识点又是零散的,所以需要人工总结起来,以便于我们更快捷地进行GMAT复习,小编为大家总结了GMAT数学题的一些典型做法,希望对大家有所帮助。
一些概念
独立事件:independent event
A,B共同发生的概率=A发生发生的概率B发生的概率
互斥事件:mutual exclusive event
A发生的概率+B发生的概率=A or B发生的概率
标准差:
== 标准差
项数标准差,若各项同时增加或减少某数,例如加5,则标准差不变
项数标准差,若各项同时增加或减少某比例,例如5%,则标准差会等比增加或减少
公理:两个数的乘积=其最大公约数最小公倍数
区分概念单词:
Quadrilateral 四边形
Parallelogram 平行四边形
余数的算法
余数的计算:
1. 余数可以加减: mod q=+) mod q
2. 余数可以相乘:MN除以q的余数,就等于M除以q的余数 乘以 N除以q的余数,再求余数:MN mod q= mod q
3. N^m 除以q的余数:先求N除以9的余数,然后相乘后再求余数:
M^n mod q =^n mod q
只要我们尽量把计算中的余数凑成与1相关的乘式
等比数列
通项:An=A1q^
求和:S=A1 /
等差数列
通项:An=A1+d
求和:S=n/2
OG
OG12-81
Amount of Bacteria Present
Time Amount
1:00 P.M. 10.0 grams
4:00 P.M. x grams
7:00 P.M. 14.4 grams
81. Data for a certain biology experiment are given int he table above. If the amount of bacteria present increased by the same factor during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M. ?
12.0
12.1
12.2
12.3
12.4
OG12-106
106. When positive integer x is divided by positive integer y,the remainder is 9. If x/y= 96.12, what is the value of y ? X=96Y+0.12Y
96
75
48
25
12
OG12-73
73. If m is an integer, is m odd?
m/2 is not an even integer. 不是偶数,不一定就是奇数 可能是小数
m 3 is an even integer.
以上就是GMAT数学的一些零散知识点的全部内容,希望大家在GMAT考试中灵活运用,最后也预祝大家子啊GMAT考试中取得佳绩。
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