标题: 求教两道数学题 [打印本页] 作者: luojisi 时间: 2011-9-24 08:22 标题: 求教两道数学题 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. A. Statement (1) alone is sufficient...........................................
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. k/m% B.(K-m)% C.[100(k-m)]/(100+k)% D.[100(k-m)]/(100+m)% E.[100(k-m)]/(100+k+m)%