Solutions by everydaycalculation.com
The GCF of 21 and 840 is 21.
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Find HCF of: 42 & 1680 63 & 2520 7 & 280 105 & 4200 147 & 5880 3 & 120 42 & 840 21 & 1680 63 & 840 21 & 2520 105 & 840 21 & 4200 147 & 840 21 & 5880
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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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