GRE考试数学部分机经汇总

3.There is a circular water fountain of Diameter 12m.The wall of the tank has a width of 2m. If the thickness of the fountain is0.06m, what is the volume of the concrete used in constructing the tank?
Ans: 1.68 pie

我做出来是12*2*0.06*pie=1.44 pie，，咋弄出来的？。。。

8. A label of vertical width w is stick on acylinderical vessel with area A(some

number) and height 10 cm.
Cola: w
Colb: 4.5
Ans: D

10.There was a $25 discount on every purchase of $75there was a 10% charge on

shipping which was added before the discount and 20% sales tax after the discount

was added. If john paid total $300, whatwas the original amount of purchase if no

sales tax was added per $75
Ans : 240.
这道题没看明白，是说算原始价格吗？还是只算不加税的咩？
如果只算不加税的，也应该是 300/（1+20%）=250...

3.The area of rectangular region R is equal to thearea of rectangular region T.
The Ratio of the length to the width of R is 3 to 1.
the length & width of T are 12 & W, respectively.
Col A : w
Col B : 4
Ans: C

两个只是面积相等，有没有相似，凭啥w就等于4了。。。

8. Given Principal amount P,rate of interest was r,and the amount increase from

1990 to 1995 and 1995 to 2000 each time by r%. sothe total amount was (7/5)p at the

end of 2 yrs .
Col A : r
Cola B: 20

这个没答案，是B吗？。。。两次都增长20%，会大于7/5，故r应该小雨20。。。

1. What is the least possible product of 4 different integers,each of which has a

value between –5 and 10, inclusive?
(A) - 5040
(B) - 3600
(C) - 720
(D) - 600
(E) - 120
Ans : B
-3600=-5*8*9*10
我觉得应该选A，5040=7*8*9*10不可能有负值，不知道between包不包括-5和10，不过如果这样

算的话，-5040也不对

5. A ranch has horses and ponies. Five-sixths of theponies have horseshoes. Half of

the ponies with horseshoes are Icelandic. Ifthere are three more horses than

ponies, what is the minimum number of horsesand ponies on the ranch?
A. 12
B. 15
C. 27
D. 48
E. 54
Ans: C