数学题求解~！！！

小皮麽西瓜 · 发表于 2014-6-26 13:05:43

1，一个灯柱高25feet,一个男人离它20feet,影子长5feet，那个人也高5feet，这个男人以2feet/second的速度前进，问影子以多少的速度增长？
说是0.5

2. S=1+(1/2）^2+(1/3)^2+(1/4)^2+......+(1/10)^问S大小？
说是S小于2

3. which of the following lists the numbers of points at which a circle can intersect a triangle?
A. 2 and 6 only B. 2,4, and 6 only
C. 1,2,3, and 6 only D. 1,2,3,4, and 6 only E就不列了。。
说是C

4. What is the greast common divisor of positive integers m and n?
(1) m is a prime number
(2) 2n=7m
DS题说是C

5. If n and y are positive intergers and 450y=n^3, which of the following must be an integer?
1) y/[3*(2^2)*5]
2)y/[(3^3)*2*5]
3)y/[3*2*(5^5)]
PS题说only 1) 是对的

6. At a diner party, 5 people are to be seated around a cicular table. Two seating arrangements are considered different only when the positions of the people are different relateive to each other what is the total number of different possible seating arrangements for the group?
说是24

以下的题目意思有点搞不拎清，看看能不能疏通下~？
7. Farm有60只动物， 2/3 are either pigs or cows. How many fo the animals are cows?
(1） The farm has more than twice as many cows as it has pigs
(2) The farm has more than 12 pigs
DS题说是C

8. Three boxes, average weight 7kg, median weight 9kg, What is the maximum possible weight, in kg, of the lightest box?
选项有1,2,3,4,5. 它说要选3kg....

非常感谢~！！！！

数学题求解~！！！

所属分类: GMAT考试

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