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Highest common factor of 21 and 27?

Updated: 8/17/2019
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13y ago

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the HCF or GCF is 3

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13y ago
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Q: Highest common factor of 21 and 27?
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What is the highest common factor of 21 27 91?

It is: 1


What is the highest common factor between 21 and 27?

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What are the highest common factor of 21 and 27?

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The greatest common factor of 21 and 27 is 3 because that is the highest number that goes into 21 and 27. To find the highest common factor of two numbers, you first have to break them down into their prime factors. In this case, the prime factors of 21 and 27 are: 21 = 3x7 27 = 3x3x3 The next step is to identify any common factors. In this case, the only common prime factor is 3. Thus, the highest common factor of 21 and 27 is 3.


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