S,T 為連續的数
S的算數平均值大于T的
194.a rectangular has area of 15000 square feet, the length is 50 feets than the width, what is the length? A:150
8.abcdefg seven medicine, how many different discriptions that the doctor can give if any three of them are chosen and a and b cannot be taken at the same time together?
A:30 196. which one has least value:
a: 1/100, b: 0.1/10, c: 1/600, d: 0.01/10 e: ? my key: c
197.1/1000=?
198.k=0.1-0.1^2, x0.05?
a: K0.0009/x
b: k0.009x
199. ask the volume of a cube
a: k, k+2, k-1 is its three side
b: one of its greatest surfcae is 120
200.p,q,r,s依次排开,ps=10,ask qr=?
a:qs=9
b:pr=3
201.求一个表达式。两组数字,a有4,象对应b有4个,其中一个是x,
my choice is x=a^2/1-b, sorry, 记的不清楚, anyway, it is easy.
202.n11的质数,求n=?
A: 2^-n2^-6
B: 4^-n2^-6
204. 一个数,不是prime,那么一定是 ? 选E
a) 一个even prime加一个odd prime
e) multiple of primes
205. 看X报的有60%,看Y报的有75%.问至少有多少人两种报都看? 答案:35%
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