标题: 求教几个数学问题, 答案有疑问 [打印本页] 作者: sandyclause 时间: 2010-8-18 10:51 标题: 求教几个数学问题, 答案有疑问 1: If n is a positive integer, what is the remainder when 3^(8n+3) +2 is divdied by 5? A. 0 B. 1 C. 2 D. 3 E.4 给的答案是A, 我觉得像是E 呢.......
2: A total of 100 customers purchased books at a certain bookstore last week. If these customers purchased a total of 200 books, how many of the customers purchased only 1book each? (1) None of the customers purchased more than 3 books. (2) 20 of the customers purchased only 2 books each. 给的答案是C, 我觉得是E