GRE数学考试的经典例题讲解
考生在备考GRE数学考试的过程中,可以多了解一些比较经典的例题。下面就让小编给大家讲解GRE数学考试的比较经典的部分例题吧,希望能对你有帮助!
GRE数学的经典例题:dollar amountIf 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%(约等于)
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.
本题A选项一看到就可以排除了,涉及到两个店的绝对量的比较,这个不确定,没有告诉绝对值。B选项是把两个增长的比例简单地算术相加。肯定错了。所以C肯定是对的`了。。算一下也是的确是对的。
GRE数学例题解析:more than twiceEach 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
本题我们要注意到题目中的more than twice的字眼,我们当做twice算的时候,结果是(25000*2+35000)/3约等于28333,因为有more than,所以选的答案要么是比前面这个数大,要么小,又由于more的是X部门的,那么肯定会将平均工资给拉低了,因此,选比前面那个数小的答案,AB都可以了。
GRE数学例题讲解:how many minutesWorking 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
这类GRE OG题目小学时候经常遇到,相信很多人都是这种感受哈
1/(1/10+1/15)=6min
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