题目信息
How many integers between 1 and 16, inclusive, have,
exactly 3 different positive integer factors?
(Note: 6 is NOT such an integer because 6 has
4 different positive integer factors: 1, 2, 3, and 6.)
A:1
B:2
C:3
D:4
E:6
参考答案及共享解析

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已选答案:
正确答案:
B:2
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