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QUESTION
What is the greatest common factor of 42, 126, and 210?
The GCF = 42
The prime factors of 42 = 2,3,7
The prime factors of 126 = 2, 3, 3, 7
The prime factors of 210 = 2,3 ,5, 7
The common values are ##2*3*7= 42##
The GCF = 42
