GMAT数学应用题知识点-智课教育.pdf
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GMAT数学应用题知识点-智课教育
GMAT Quantitative(数学)内容涉及数据充分性(Data
Sufficiency)和问题解答(Problem solving)两种类型,
一共37道,75分钟。问题求解 Problem Solving,共有21-22题。试题
形式可能是文字叙述形式,要求考生进行计算,也可能要求对图、表进
行解释。内容涉及大量的算术、代数和几何的基本定理。数据填充
Data Sufficiency,共有15-16道题,每道题中均含有数学问题和两个
与之相关的说明。本文就给大家介绍下GMAT数学应用题知识点。
例1:
A total of 774 doctorates in mathematics were granted to
United States citizens by American universities in the 1972-1973
school year, and W of these doctorates were granted to women.
The total of such doctorates in the 1986-1987 school year was
362, and w of these were granted to women. If the number of
doctorates in mathematics granted to female citizens of the
United States by American universities decreased from the
1972-1973 school year to the 1986-1987 school year, was the
decrease less than 10 percent?
(1)1/10
(2)W=w+5
题干意思:
1972年到1973之间美国公民中有774个博士,有W个是女性,在1
986-1987 共有博士362,其中有w个女性。那么这两个期间段之间女
性博士下降的比例小于百分之十吗?
分析:条件一知道W范围不知道w取值,单独不能求出,条件二给
出两个的差值是5,也是单独不满足。结合条件一二 ,W/774-(W-5)/3
36=W/774-W/362+5/362 所以得出W跟774的关系还是看不出来 ,再
次转化 ,W/774-W/774*774/362+5/362.因为1/10
W/774-W/774*774/362+5/362 1/9-1/10*774/362+5/362
注意:这道题需要转化的思想。
例2:
A parking garage rents parking spaces for $10 per week or
$30 per month ,How much does a person save in a year by
renting by the month rather than by the week?
题干意思:
停车可以一周10美元或者选用一个月30美元的方式,那么这个人按
照月存比按照周存省多少钱?
分析:如果我们按照一个月四周 ,一年12个月来计算的话 ,那就可
能算作48个周 ,那么按照月算就是360美元 ,按照周算的话就是480美
元 ,省120,但是选项里边没有这个答案 ,所以我们认为的一年48周是
错误的。
一年365天 ,一周7天 ,那么一共有52周才正确 ,这样周计费就是5
20美元 ,答案就是160.
例3: in 1979 approximately 1/3 of the 37.3 million airline
passengers traveling to or from the unite states used Kennedy
Airport. if the number of such passengers that used Miami
Airport was 1/2 the number that used Kennedy Airport and 4
times the number that used Logan Airport, approximately how
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