Find the highest factor of the smallest of the numbers and divide it into the highest number, if it goes in exactly that's your answer?
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The GCF is 6.
The GCF is 3.
The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
The GCF is 42.
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42.The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.The common factors are: 1, 2, 3, 6The Greatest Common Factor (GCF) is: 6