扫描二维码，直接登录
题库 / Prep2007E2-DS-123
When positive integer n is divided by 3, the remainder is 2; and when positive integer t is divided by 5, the remainder is 3. What is the remainder when the product nt is divided by 15 ?
(1) n - 2 is divisible by 5.
(2) t is divisible by 3.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
已知n=3a+2, t=5b+3
(1)可以得到：n-2=3a=5c,所以 n=15A+2
(2)可以得到：t=5b+3=3d, 所以t=15B+3 nt=15C+6, 余数为6
登录 或 注册 后可以参加讨论