作者hsingchih (请赐我GRE高分吧!!)
看板GRE_Verbal
标题[计量] 请教数学问题
时间Tue Oct 16 21:16:39 2007
r＝s3次方t6次方
Column A t3(三次方)
Column B r／1000
Ans: C equal
If 55 percent of a group of people have brown hair and 80 percent
of the same group do not have red hair, which fraction of those who do
not have brown have red hair?
(a) 1/4 (b)4/11 (c)4/9 (d) 5/9 (e) 4/5
Ans: C
X and Y are integers, XY=400 and 0<X<Y
Column A X
Column B 20
Ans: B is greater
n= k+r/s ／t/v
In the equation above, k,r,s,t and v represent positive numbers.
Multiplying which one of these numbers by 2 will reduce the value
of n to 1/2 of its present value?
(a) k (b) r (c) s (d) t (e) v
Ans: D
A certain money market account that had a balance of $48,000
during all of last month earned $360 in interest for the month.
At what simple annual interest rate did the account earn interest last month?
(a) 7% (b) 7.5% (c) 8% (d) 8.5% (e) 9%
Ans: E
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