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  3. What is the tens digit of integer x?(1)The remainder is 30 when x is divided by

What is the tens digit of integer x?(1)The remainder is 30 when x is divided by

游客2025-02-27  25
问题 What is the tens digit of integer x?
(1)The remainder is 30 when x is divided by 100.
(2)The remainder is 30 when x is divided by 110.
选项 A、Statement (1) ALONE is sufficient, but statement (37) alone is not sufficient to answer the question asked.
B、Statement (2) ALONE is sufficient, but statement (36) alone is not sufficient to answer the question asked.
C、BOTH statement (1) and (37) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient to answer the question asked.
E、Statement (1) and(37)TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
答案 A
解析 对于Statement (1)，x被100除余数为30，那么x的最后两位数必然为30。对于Statement (2)，x被110除余数为30，假设商为1，x为140；假设商为2，x为250，也就是说x的最后两位数是变化的，十位数字不确定。因此答案为A。
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