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?