标题：12月4日GRE数学小范围机经预测

内容：
12月4日的GRE考试马上就要开始了，同学们准备的怎么样了呢？

出国留学网GRE栏目为您整理12月4日GRE数学小范围机经预测，希望能有所帮助哦!

题目1.

If k is an integer and 121 k^2 225,then k can have at most how many values?

A.

3B.

4C.

5D.

6E.

7答案：D.

解析：k可以是12,13,14,-12,-13,-14.

2.

Runner A ran 4/5 kilometer and Runner B ran 800 meters.

Quantity A: The distance that A ranQuantity B: The distance that B ranA.

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：C解析：Quantity A=(4/5)*1000=800=Quantity B。

3.

x y z,Quantity A: (x + y + z)/3Quantity B: yA.

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：已知条件太少，AB大小都可以根据不同数据列出可能答案，因此无法判断准确唯一解，选D。

4.

A reading list for a humanities course consists of 10 books, of which 4 are biographies and the rest are novels.

Each student is required to read a selection of 4 books from the list, including 2 or more biographies.

How many selections of 4 books satisfy the requirements?

A.

90B.

115C.

130D.

144E.

195答案：D解析：10本书中，4本biographies，6本novel。

現在biographies要选2本以上。

思路1：正面解法所以可能情形有bio选2本(配nov选2)+bio选3本(配nov选1本)+bio选4本(配nov选0本)。

即(C4取2乘C6取2)+(C4取3乘C6取1)+(C4取4乘C6取0)=115思路2：反向解法用全部扣除bio选0本(配nov选4)再扣bio选1本(配nov选3)利用C10取4-C4取0*C6取4-C4取1*C6取3 = 210 - 15 - 80 = 1155.

In a graduating class of 236 students, 142 took algebra and 121 took chemistry.

What is the greatest possible number of students that could have taken both algebra and chemistry?

答案：121解析：可能不少人会用142+121-236=27的思路来解题，但问题是least possible number，同时也没有表明只能选两门课，因此有可能还有其他課可选，因此正确答案是眼前两个交集的最大数，也就是142和121取最小数，121个学chemistry的都选了algebra。

所以为121。

GRE机经栏目推荐：　　2016GRE全国成绩查询　　2016年GRE考试时间表　　2016年GRE考试真题及答案汇总

发布时间：2025-08-14 14:53:21
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