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The GCF of 16, 63 and 75 is 1.

The factors for each number are: 16 - 1, 2, 4, 8, 16 63 - 1, 3, 7, 9, 21, 63 75 - 1, 3, 5, 15, 25, 75 The only number in common is the 1, so this makes it the greatest common factor.

The factors of 63 are: 1, 3, 7, 9, 21, 63

The factors of 75 are: 1, 3, 5, 15, 25, 75

The common factors are: 1, 3

The Greatest Common Factor (GCF) is: 3
The GCF is 1.

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Q: What is the greatest common factor of 16 63 and 75?
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