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The squares of all prime numbers less than 10.

The squares of all prime numbers less than 10.

The squares of all prime numbers less than 10.

The squares of all prime numbers less than 10.

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The squares of all prime numbers less than 10.

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Q: Which numbers less then 100 have exactly three factors?

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25 and 49

Prime squares have three factors. There are 11 of them in that range.

4, 9, 25 and 49 They are squares of prime numbers.

49

105

Related questions

By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.

25 and 49

14 (I think).

4, 9, 25, and 49

4, 9, 25, 49

0, 1, 2, 3

Four numbers less than thirty, 12, 18, 20, and 28, each have exactly 6 factors.

Prime squares have three factors. There are 11 of them in that range.

The smallest number that has exactly three factors is 4.

4, 9, 25 and 49 They are squares of prime numbers.

The ones with less than three factors.

6, 8 and 91 and three examples.

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