1. If n is a positive integer and r is the remainder when(n-1)*(n+1)
is dividend by 24,what is the value of r?
(1)2 is not a factor of n
(2)3 is not a factor of n
答案是c 這題我後來是湊數字算出來的@@有點奇妙
想請問這類題目有甚麼規則去解嗎?
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) %
我完全被搞混了XD"不知道它要問甚麼..
麻煩各位前輩解答@@"
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