有对应GWD31版本的数学讨论总汇吗？+难题求解

如题！

难题：

GWD-SET3

Q18:

Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent, where k is greater than m.  By what percent did the ratio of price per share to earnings per share increase, in terms of k and m?

A.   k/m %

B.   (k-m) %

C.   [100(k-m)]/(100+k) %

D.   [100(k-m)]/(100+m) %

E.    [100(k-m)]/(100+k+m) %

Answer: D

Q22:

If a company allocates 15 percent of its budget to advertising, 10 percent to capital improvements, and 55 percent to salaries, what fraction of its budget remains for other allocations?

A.   4/5

B.   3/5

C.   3/10

D.   1/5

E.    1/10

Answer: D

Q33:

A photographer will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second row.  The heights of the people within each row must increase from left to right, and each person in the second row must be taller than the person standing in front of him or her.  How many such arrangements of the 6 people are possible?

A.   5

B.   6

C.   9

D.   24

E.    36

Answer: A

Q14: 

How many seconds will it take for a car that is traveling at a constant rate of 45 miles per hour to travel a distance of 22 yards?       (1 mile = 1,160 yards)

A.   8

B.   9

C.   10

D.   11

E.    12

Answer: C

同问,GWD数学有讨论汇总吗?