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4.
The HCF is: 2
8
The GCF is 7.
It is: 56/72 = 7/9 by dividing 56 and 72 by their HCF
The GCF is 14.
The GCF is 4.
The GCF is 28.
HCF(56, 98, 168) = 14
The HCF of 12 and 60 is 12
The HCF of 56 and 21 is 7
The GCF is 6.
The GCF is 20.
The GCF is 12.
The GCF is 10.