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The GCF of 21 and 428 is 1.
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Find HCF of: 42 & 856 63 & 1284 105 & 2140 147 & 2996 42 & 428 21 & 856 63 & 428 21 & 1284 105 & 428 21 & 2140 147 & 428 21 & 2996
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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).
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