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题目内容
What is the remainder when the positive integer
x
is divided by 8?
(1) When
x
is divided by 12, the remainder is 5.
(2) When
x
is divided by 18, the remainder is 11.
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.
答案:E
专业教师答疑
问题:@徐小梅老师,为什么这题不能选C用余数通项去求呢?求余数通项是在什么题型下使用呢?
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问题:这道题我的做法是先根据题意1和2条件分别列出x=12a+5以及x=18b+11然后我求通项公式让这两个等式相等以及12和18的最小公倍数得出通项公式为x=36a+29后面不知道怎么做了求老师告知谢谢
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问题:x=12a+5=18b+11 所以,3b=2a-1,然后该怎么解?
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问题:还是没有思路的题,求解。
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