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First, determine the factors of each number -

The factors of 10 are: 1, 2, 5, 10

The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

Next, find the common factors between the two numbers:

The common factors are: 1, 2, 5, 10

Finally, the largest of the common factors is the GCF -

The Greatest Common Factor (GCF) is: 10

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14y ago

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