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题库 / Prep2007E1-DS-92
Is the integer r divisible by 3 ?
(1) r is the product of 4 consecutive positive integers.
(2) r < 25
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）。
每3个连续的整数中，一定会有一个3的倍数
DS 要时刻提醒自己 看清楚题目问的是什么 有时候不需要算出具体数值
看清楚题目，不是问r的值，而是问能否被3除！