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Is 45 a prime or composite number how do you know?

Updated: 8/20/2019
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Wiki User

11y ago

Best Answer

45 is a composite number.

A number is composite if it can be evenly divided by and least 3 numbers (if it has at least 3 factors). Any composite number has at least one factor other than one and itself.

45 has 6 factors: 1, 3, 5, 9, 15, and 45.

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Wiki User

11y ago
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Q: Is 45 a prime or composite number how do you know?
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