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The GCF of 30 and 100 is 10.

The prime factorization of 30 is 2x3x5

The prime factorization of 100 is 2x2x5x5

GCF(30, 100) = 2x5 = 10

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7y ago
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13y ago

There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.

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12y ago

You need at least two numbers to find a GCF.

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Wiki User

8y ago

Since 10 is a factor of 30, it is automatically the GCF.

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Wiki User

11y ago

The GCF is 10.

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Wiki User

8y ago

The GCF is 100.

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Wiki User

12y ago

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Q: What is the greatest common factor of 30 and 100?
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