GRE數(shù)學(xué)考試的經(jīng)典例題講解
考生在備考GRE數(shù)學(xué)考試的過(guò)程中，可以多了解一些比較經(jīng)典的例題。下面就讓小編給大家講解GRE數(shù)學(xué)考試的比較經(jīng)典的部分例題吧，希望能對(duì)你有幫助!
GRE數(shù)學(xué)的經(jīng)典例題：dollar amount
If the dollar amount of sales at Store P was $800,000 for 2006, what was the dollar amount of sales at that store for 2008 ?
A $727,200
B $792,000
C $800,000
D $880,000
E $968,000
直接算，800000*(1+10%)*(1-10%)=792000，即B
2)At Store T, the dollar amount of sales for 2007 was what percent of the dollar amount of sales for 2008 ?
Give your answer to the nearest 0.1 percent.___________%
直接算，1/(1-8%)=108.7%(約等于)
3)Which of the following statements must be true?
Indicate all such statements.
A For 2008 the dollar amount of sales at Store R was greater than that at each of the other four stores.
B The dollar amount of sales at Store S for 2008 was 22 percent less than that for 2006.
C The dollar amount of sales at Store R for 2008 was more than 17 percent greater than that for 2006.
本題A選項(xiàng)一看到就可以排除了，涉及到兩個(gè)店的絕對(duì)量的比較，這個(gè)不確定，沒有告訴絕對(duì)值。B選項(xiàng)是把兩個(gè)增長(zhǎng)的比例簡(jiǎn)單地算術(shù)相加�？隙ㄥe(cuò)了。所以C肯定是對(duì)的了。。算一下也是的確是對(duì)的。
GRE數(shù)學(xué)例題解析：more than twice
Each employee of a certain company is in either Department X or Department Y, and there are more than twice as many employees in Department X as in Department Y. The average (arithmetic mean) salary is $25,000 for the employees in Department X and is $35,000 for the employees in Department Y. Which of the following amounts could be the average salary for all of the employees in the company?
Indicate all such amounts.
A $26,000
B $28,000
C $29,000
D $30,000
E $31,000
F $32,000
G $34,000
本題我們要注意到題目中的more than twice的.字眼，我們當(dāng)做twice算的時(shí)候，結(jié)果是(25000*2+35000)/3約等于28333，因?yàn)橛衜ore than，所以選的答案要么是比前面這個(gè)數(shù)大，要么小，又由于more的是X部門的，那么肯定會(huì)將平均工資給拉低了，因此，選比前面那個(gè)數(shù)小的答案，AB都可以了。
GRE數(shù)學(xué)例題講解：how many minutes
Working alone at its constant rate, machine A produces k car parts in 10 minutes. Working alone at its constant rate, machine B produces k car parts in 15 minutes. How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k car parts? ____________minutes
這類GRE OG題目小學(xué)時(shí)候經(jīng)常遇到，相信很多人都是這種感受哈
1/(1/10+1/15)=6min
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