考得不好,今天的數學題目文字長度都不算短,不過至少數學是50答案可以僅供大家參考,
1)GWD 7-Q11: If 3^6x = 8,100, what is the value of {3^(x – 1)}^3 ?
A: 90 ; B: 30 ; C: 10 ; D: 10/3 ; E: 10/9
答案：D
2)GWD13-18。
A certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996. If total revenues from car sales and truck sales in 1997 were up 1 percent from 1996, what is the ratio of revenue from car sales in 1996 to revenue from truck sales in 1996?
A 1 : 2 ; B4 : 5 ; C1 : 1 ; D3 : 2，E 5 : 3
答案：A
3)假设f(n)=2^x3^y5^z(就是2的x次方乘以3的y次方乘以5的z次方），其中n是3位数，x,y,z分别是百位十位和个位数，若f(u)=9f(v),问u-v=?
答案：:20
4)10的多少%是1的10%
答案:1%
5)每個月的A值會對應一個B值,二都呈線性關係,將此方成式畫在XY座標上A介於0~30,問是否會交於正y軸?(題目有點長)
A.給一個A1值對應的一個B1值,及另一個A2值和其對應的B2值=>可解
出一個y=ax+b,x=0時,y=+
B給一個A和B的關係式X=0時,y=-
答案:A
6)f(N)是<N 的正整數(其不具有和N除了1以外的公因數)的個數,若N 是質數,問f(N)=?
答案:N-2
7)一辆车，按75M/小时的速度行进一公里所用的时间，比用另一个速度行进一公里所用时间少2秒，问另一个速度。
答案：72M/H
8)一個五邊形,分成三個直角三角形,然後給五邊形其一邊長度(可能是16),餘4邊皆相等,求相等邊之邊長?
答案:2,用a^2+b^2=c^2算,可得16=4x^2=>x=2
补充：8)一個五邊形,分成三個直角三角形,然後給五邊形其一邊長度(可能是4),餘4邊皆相等,求相等邊之邊長?
答案:2,用a^2+b^2=c^2算,可得16=4x^2=>x=2
我不知道如何貼圖,所以我再詳述一下好了
在第一個三角形中的x^2(斜邊)=4^2(一股)+a^2(另一股未知),
而此斜邊正好為另一個相鄰三角形的一股,所以y^2(斜邊)=x^2+a^2,以此類推,第三個三角形的斜邊正好也等於a,所以全部代回第一個三角 形,可消除全部未知的斜邊
9)一共有9連續正整數，从小到大排列，求中位数？
(1) 前7个数的中位数是m ; (B) 后7个数的中位数是n (m,n為數字)
答案
AA
The following appeared in the editorial section of a campus newspaper.
“Because occupancy rates for campus housing fell during the last academic year, so did housing revenues. To solve the problem, campus housing officials should reduce the number of available housing units, thereby increasing the occupancy rates. Also, to keep students from choosing to live off-campus, housing officials should lower the rents, thereby increasing demand.”
AI
“Employees should not have full access to their own personnel files. If, for example, employees were allowed to see certain confidential materials, the people supplying that information would not be likely to express their opinions candidly.”
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