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The greatest common factor (GCF) of 42 and 63 is 21.
To find the GCF (greatest common factor) of two numbers, first prime factorize them.
42 = 2*3*7
63 = 3*3*7
The GCF must be able to contain factors such that if divided by 42 or 63, the answer will be an integer.
The GCF is 21.
21
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The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 21, 42, and 63 is 21The GCF is 21.The GCF is 21.
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21
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