求助 GWD数学！

edenbamboo

1。If n is a positive integer and r is the remainder when (n – 1)(n + 1) is divided by 24, what is the value of r?
(1)   2 is not a factor of n.
(2)   3 is not a factor of n.

假如n是1的话，余数是24 n不等于1 余数为0！

应该选什么？

2。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.   %
B. (k – m) %
C. [100(k – m)] / (100 + k) %
D. [100(k – m)] / (100 + m) %
E. [100(k – m)] / (100 + k + m) %

3。What is the total value of Company H’s stock?
(1)   Investor P owns 1/4 of the shares of Company H’s total stock.
(2)   The total value of Investor Q’s shares of Company H’s stock is $16,000.

myamanda

2，d？ 假设前年price per share 和earnings per share 分别是A，B，比例为A/B

则今年上升后变为A(100+K)%和B(100+M)%，比例为A(100+K)% 除以 B(100+M)%

问这个price per share to earnings per share 的比例上升多少，即

(A(100+K)% / B(100+M)%   -  A/B  )/ A/B ,算一下答案为d

3，应该为e吧，好像都不可以推出来啊

1，没搞懂，再想想

edenbamboo

3。2个合并一起为什么推不出来啊

myamanda

因为也许还有股东r，s，t呢？pq不代表全部股东啊，对么