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To work this out, you first need to break the numbers down into their prime factors. This gives:

72 = 2x2x2x3x3

27 = 3x3x3

The next step is to identify any common prime factors. In this case both numbers have two 3s as prime factors. Multiply these together and you get:

3x3 = 9

Therefore the HCF of 72 and 27 is 9.

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13y ago

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Wiki User

7y ago

It is: 9

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Anonymous

Lvl 1
4y ago

8

8

88

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Anonymous

Lvl 1
4y ago

9

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Anonymous

Lvl 1
4y ago

9

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Q: What is the HCF of 72 and 27?
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