Is the integer k divisible by 4 ?
(1) 8k is divisible by 16.
(2) 9k is divisible by 12.
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.
把条件一化简得出k is divisible by 2,不成立,因为k可以被2整除,不能代表k能够被4整除;把条件二化简得出3k is divisible by 4,我们现在把原条件k/4 上下同乘以3得出 3k/12,所以根据条件二得出,3k可以被4整除,那证明k肯定有一个约数是4,所以3k可以整除12.
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