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  3. What is the number of integers whose square is between 101 and 200?

What is the number of integers whose square is between 101 and 200?

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问题 What is the number of integers whose square is between 101 and 200?
选项 A、3
B、4
C、5
D、6
E、8
答案E
解析 (±11)2、(±12)2、(±13)2、(±14)2在101到200之间，所以有8个整数：+11，-11，+12，-12，+13，-13，+14，-14。故答案为E。当题目提到“整数”和“平方”时，需要考虑正负数的取值。
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