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GMAT数学应用题知识点-智课教育.pdf

发布:2017-05-25约4.63千字共6页下载文档
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智 课 网 G M A T 备 考 资 料 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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