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) %
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.

第一题选D。问价格与利润的比率增长了多少， [(100+k)/(100+m)-1]*100%，化简一下就是D。
第二题选C。这题俺是自己列了几个数字做出来滴。好像很久以前有人给解释过，不过不记得是咋解释的了