GRE机经题目练习 | 12.10GRE数学大小比较题(附答案与解析)

今天GRE资料君mmmgre与大家分享的GRE机经题目练习是GRE数学大小比较题。一共有3题,来看看你做对了吗?

01

Quantity A:Length of AB

Quantity B:Length of BC

A. Quantity A is greater.

B. Quantity B is greater.

C.The two quantities are equal.

D.The relationship cannot be determined from the information given.

答案:D

解析:根据图中信息,角C是89度,所以我们只能知道角A加角B是91度,无法得知角A的具体度数,大边对大角小边对小角,角A的大小情况无法判断,无法判断角A和89度的大小,自然也就无法判断AB和BC的长度关系


02

n is an even integer.

A. The number of prime factors of n

B. The number of prime factors of n/2

A. Quantity A is greater.

B. Quantity B is greater.

C. The two quantities are equal.

D. The relationship cannot be determined from the information given.

答案:D

解析:举例子就可以。n是偶数,n可以是2,那么2只有一个质因子2,n/2是1,1是没有质因子的,此时A>B,再比如n=4,4只有一个质因子2,4的1/2是2,也只有一个质因子,此时A=B,所以最终选D,无法比较AB大小。

03

In a bowl that contains 20 marbles,7 are green,6 are red,and the remainder are blue.Two marbles are to be drawn at random from the bowl without replacement.

Quantity A:The probability that one marble is green and the other marble is red

Quantity B:The probability that one marble is green and the other marble is blue

A. Quantity A is greater.

B. Quantity B is greater.

C. The two quantities are equal.

D. The relationship cannot be determined from the information given.

答案:B

解析:概率=发生时间数/总事件数 总事件数是 20个marble选2个是c(20,2) A事件是选一个绿的一个红的 ,意思就是7个绿的选一个绿的6个红的里选一个红的,所以是C(7,1)*C(6,1) A的概率=C(7,1)*C(6,1)/c(20,2),同理可求b的概率,根据题意蓝色的=20-7-6=7 所以b概率=C(7,1)*C(7,1)/c(20,2)GRE资料君mmmgre不定期分享GRE资料及资讯干货。

上面3道GRE数学大小比较题,你做对了吗?

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