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How many positive integers less than 103 have an odd number of positive divisors?

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User Gameweld
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Answer:

The only positive integers that have an odd number of positive divisors are perfect squares, so the only positive integers less than 103 that have an odd number of positive divisors are 1, 4, 9,. . ., 100. There are 10 of these numbers.

Explanation:

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User Ruthvik
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