gre数学考试代数文字的重点试题3

　　21.Sixty-eight people are sitting in 20 cars and each car contains at most 4 people. What is the maximum possible number of cars that could contain exactly 1 of the 68 people?

　　A.2

　　B.3

　　C.4

　　D.8

　　E.12

　　答案：C

　　22.Art,Bob and Carmen share a prize of $400. If Art receives twice as much as Bob, and if Bob receives 1/2 as much as Carmen, how much does Carmen receive?

　　A.$20

　　B.$40

　　C.$80

　　D.$140

　　E.$160

　　答案：E

　　23.A time-study specialist has set the production rate for each worker on a contain job at 22 units every 3 hours. At this rate what is the minimum number of worker that should be put on the job if at least 90 units are to be produced per hour?

　　A.7%

　　B.7.5%

　　C.8%

　　D.8.5%

　　E.9%

　　答案：E

　　24.To obtain an FHA mortgage for $50,000 or more, the home buyer must have a down payment equal to 4 percent of the first $25,000 of the mortgage amount and 5 percent of the portion in excess of $25,000. At settlement the buyer pays a mortgage insurance premium equal to 3 percent of the mortgage amount. What is the maximum FHA mortgage, if any, a buyer can obtain if the buyer has only $6,000 available for the down payment and insurance premium?

　　A. $62,500

　　B. $71,875

　　C. $78,125

　　D. $125,000

　　E. The home buyer cannot obtain an FHA mortgage.

　　答案：C

　　25. Working alone, a small pump takes twice as long as a large pump takes to fill an empty tank. Working together at their respective constant rates, the pumps can fill the tank in 6 hours. How many hours would it take the small pump to fill the tank working alone?

　　A.8

　　B.9

　　C.12

　　D.15

　　E.18

　　答案：E

　　26.A candy assortment consists of seven flavors of chocolate-covered creams packed in two-layered boxes with 27 creams in each layer. The flavors are always packed in rows so that the flavor varies with each piece in the following order: vanilla, orange, cherry, vanilla raspberry, lime, pecan, cherry, lemon. How many chocolate- covered vanilla creams are needed to peak 200 boxes of the assortment?

　　A.600

　　B.1,200

　　C.1,800

　　D.2,400

　　E.3,600

　　答案：D

　　27.A research scientist wants to study a certain attribute of dogs. It is estimated that approximately 5 percent of all dogs have this attribute. If the scientist wants to study a sample of N dogs having the attribute, approximately how many dogs should be screened in order to obtain the desired sample size?

　　A.N/5

　　B.5N

　　C.20N

　　D.105N

　　E.120N

　　答案：C

 

gre数学考试代数文字的重点试题的延伸阅读——GRE数学部分答题技巧

 

(1)、GRE考试之大小比较题 (Quantitative Comparison)

a)解答之前，两个Column都要先认真看一看;

b)注意出题的目的在于强调速度和捷径，因此不要陷于冗长的演算过程;

c)尽可能地简化问题，必要时画出草图或做上记号;

d)当问题中没有出现变量而都是数值时，不可以选(D);

e)当问题中出现变量x、y、z或a、b、c时，可以由0、1和-1的简单数值代替计算;如果代入不同的数值，有不同的大小关系则就选(D);

f)要特别注意数学比较大小的最后几题。

(2)、GRE考试之计量能力题 (Math Ability)

a)仔细阅读题目，把要求解的地方圈起来;

b)画出草图或在图上做记号;

c)若有简单的公式或解法，则尽量用简单的方法直接求解，再选择正确的答案;

d)若没有公式可循，则试着消去不合理的答案，即由答案做起，代入题目中验证是否正确，病且用近似值求法来简化计算过程，最终求出正确答案;

e)要特别注意最后的几题，一般设有复杂而巧妙的陷阱。

(3)、GRE考试之图表分析题(Graphic Analysis)

a)先略读一下题目;

b)检视一下图表，注意标题、图例及比较显着的变化;

c)把每个题目的重点圈起来;

d)太难的或容易混淆的题目要跳过去;

e)如果计算的项目很繁杂，应先从可能的答案求近似值，排除不合理的答案;

f)在整个数学部分的试题中，图表分析的题目应该放在最后面做。

最后注意，我们建议考生在应试数学部分的试题时一定要细心认真，考试时要有充裕时间，且已经做完一遍，最好要重新一遍。再次的验算通常可以改正四道题左右。对于我国考生来说，只有在数学部分获得高分，才能弥补部分的缺陷。