241.三个数,问mean是否等于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,按照4:1的比例合成混合物X;再从P物质和R物质中取出若干,按照1:5的比例合成混合物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, :=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?
3N能被5整除 N能被28整除 E
247. n为正整数,n是某个正整数的平方,求n的因子数一定是什么数?
一个奇数 不记得 一个质数 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?
C0 C^2=16 C
249.n=0.67K9, 能否判断K是否小于3?
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的平均速度是否大于80?
M的平均速度大于100 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?
至少有一个数为正整数 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 ??%
b. The investment is $???
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 replacement , the order doesnt matter, whats the possible combination
a. 10
b. 20
c. 30
d. 40
e. 50 这题搞了我很久,丢脸,大侠帮忙看看,数字因该准确,总之不上百
257. What is the reminder of x when it is divided by 9
a. Know the remainder of x when it is divided by 3
b. Know the remainder of x when it is divided 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 annually 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. 02
d. 02
e. ??
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