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GMAT 考试|12月数学机井概要(6)

来源:www.atolyef.com 2024-03-13

221.概念X⊙Y=/2, XY=/2 ,求(1⊙3)(1⊙5)=?

222.A,B两人TRAVEL相同的距离花浪费时间间分别为X,Y,求X/Y=? (A)
1) A,B速度的比值是C
2) 距离是150,并且B的速度是某值

223. 0.6是0.0015的多少倍?(400)

224.有60%的人做A,有75%的人做B, 问至少有多少人既做A又做B?
60%+75%-100%=35%

225. 有12个什么DD,其中3个defective,某人买2个randomly,问neither is defective的概率?
C/C=6/11

226.一直角三角形,直角顶点为,一点为,另一点为,求b? 9/4

227.Buy with the wholesale2 price of $90, and sell as 10% discount as the retailer3 price, a 20% profit on the wholesale price, what is the retailer price.
Answer : 120

228.The range of 1/2 + 1/2^2+ 1/2^3+.+1/2^10
a. 0~1/2, b. 2/3~1, c.1~3/2, d. 3/2~2, e.2~3
ANS: B

229. 一个游泳池有三个水管。二个是出水管,若独立工作分别需要2小时与3小时倾干泳池。进水管需要6小时填满泳池。若目前泳池有1/2满,问三个水管同时工作需要多久倾空泳池? 答案是45分钟。

230.下列什么数可能是1/n - 1/的值,n为integer。 选1/30

231.正方形裡有一內切圓,面積為?
A.正方形邊長10
B.正方形對角線10 x 2^1/2 D

232. 从5女3男中选3个人组成一个委员会,问至少有一个男的委员会的选法? C-C=46

233.1/33 +1/34+ ...... + 1/64 的範圍? ANS:

234. N除以3的余数是多少?
A. N除以2 余1
B. N+1除以3 余2 ANS: B

235.PS:火星卫星到火星核心的距离是5700,火星卫星到火星表面的距离是3500,假设火星是标准球体,问火星赤道周长。
r=5700-3500=2200 , 2Pi*r=4400Pi

236.问n有几个不同质数因子。条件一,n是7200的因子,条件二,180是n的因子。 ANS: C

237.已知80=22*m+n,m,n都是正整数,问n? 条件一,n22; 条件二,m=3。 D

238.一个表格,第一列是学生考试分数的分数段,第二列对应各分数段的学生数,求成绩的range?
最高分是90几分; 最低分是60几分 C

239.PS:two prime integars, the difference between them is 2, Ask: which of the following numbers could be the average of the two prime integars.
A. 11 B.21. C 26. D. 30 E.52
difference between them is 2 =应该是偶数,两别的两个数是偶数+-1,其中30两边29,31为质数. ANS:D

240.长方形面积15,000,长比宽多50,问长多少? 150

241.三个数,问mean是不是等于medium:
a)告诉medium是多少
b)最大的数、最小的数与中数各自的差均为2。 B

242. 1994年fax量80 billion,the annual number of fax increased by 700 percentage from 1987 to 1994,问1987的fax量是多少billion ?
ANS: 10

243.DS:n 是一个两位整数, 问n的十位是几?
a. 10n的百位是2 b. the tenth of n-9 is 1 A

244.有24磅P物质,有25磅R物质,分别从P物质和R物质中各取出若干,根据4:1的比率合成混合物X;再从P物质和R物质中取出若干,根据1:5的比率合成混合物Y。求混合物X有多少磅?
解:设从P物质中取出A磅,从R物质中取出B磅来合成X,则X共A+B磅;从P物质中取出24-A磅,从R物质中取出25-B磅来合成Y。
A-B=4:1, :(25-B)=1:5,连立两式:A=20, B=5. X=A+B=25

245.N是能被14整除的整数,问N是多少?
(1)3N能被5整除 (2)N能被28整除 E

246.X/Y=? Y=X+10 Y=1.01X B

247. n为正整数,n是某个正整数的平方,求n的因子数肯定是什么数?
(1)一个奇数 (2)不记得 (3)一个质数 (2)可以排除 ANS:

248.^2的算式中,X可以为所有实数,C为一个常数,C是多少?
(1)C0 C^2=16 C

249.n=0.67K9, 能否判断K是不是小于3?
(1)n精确到千分位,n=0.673 n精确到百分位,n=0.67 ANS: A

250.L和M驾驶一辆车一同行驶,平均速度为90mile/ hour.。求L的平均速度是不是大于80?
(1)M的平均速度大于100 (2)M的时间大于L的时间
C

251.有一对整数,求它们的和是多少?
(1)至少有一个数为正整数 (2)至少有一个数为负整数C

252. A company invests in certain product in 1994, whats the total amount in 1995
a. Monthly interest is ??% (real number)
b. The investment is $???

253. The mean of x, y, z is 10, x i. 9
ii. 10
iii. 11
a.I only
b. II only
c. III only
d. I and III
e. I, II, and III

254. A retailer sell red and white t-shirts in both medium and large size. The number of medium white sold is 3 times as many as large red sold. The number of medium white sold is 2 times that of large white. Total revenue of red is 80, total revenue of white is 190 Grand total is $1080. how much is the medium white ? .

255. {Sqrt+ Sqrt } / -Sqrt) - Sqrt/ {Sqrt^2- Sqrt^2}, simply the above equation. 5 choices. Just use , you can easily identify the answer)

256. 6 balls, numbered 1-6, pick one at a time without replacement4 , the order doesnt matter, whats the possible combination
a. 10
b. 20
c. 30
d. 40
e. 50 这题搞了我很长时间,丢脸,大侠帮忙看看,数字因该准确,总之不上百

257. What is the reminder5 of x when it is pided by 9
a. Know the remainder of x when it is pided by 3
b. Know the remainder of x when it is pided by 3

258. N is a two-digit number, whats the tens of n?
a. The tens of 2n =5
b. The tens of 2n=0

259. X increase annually6 by 20% in 1994 and 1995, Y increase by 40% in 1994 then by 1% of the amount of the previous year in 1995. which of the following must be true.
a. X-y2
b. 0 c. 0 d. 0 e. ??

260. xy0
a. |x|=|y|
b. x^2=y

261. The center of a circle at ,the distance of the two points on x axis7 where the circle intersect is 8, whats the circumference8

262.长方形ABCD,AB长6,BC长9。P是DA上任意一点。问:PB长小于45的几率是多少?答:3/8


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