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The GCF of 21 and 55 is 1.
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Find HCF of: 42 & 110 63 & 165 105 & 275 147 & 385 42 & 55 21 & 110 63 & 55 21 & 165 105 & 55 21 & 275 147 & 55 21 & 385
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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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