这道题,我想了半天,一点思路都没有。还是麻烦大家请讲解一下吧~ 多谢多谢!!
题目如下:
Q16: 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, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient. Answer: C 再一次,多谢多谢!! |