The GCF is 4.
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The GCF of 16 and 72 is 8. 16/72 can be reduced to 2/9
GCF(4, 8, 12, 16, 20) = 4
First find all the factors for each 32: 1, 2, 4, 8, 16, 32 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32 Now note all the common factors 1, 2, 4, 8, 16 The greatest common factor is 16
The GCF is 16.
Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 Factors of 16: 1, 2, 4, 8, 16 Factors of 12: 1, 2, 3, 4, 6, 12 GCF (24, 16, 12) = 4