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[Problem Solving]

试题详情

题目:

For any positive integer n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3 × 5 × 5. How many two-digit positive integers have length 6 ?

选项:

A、None
B、One
C、Two
D、Three
E、Four

答案:

C

提问:

请问老师这题解题思路,谢谢老师!

解答:

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解答: 徐小梅

提问:

请问老师这题解题思路,谢谢老师!

解答:

点赞1
阅读763
解答: 徐小梅老师

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