The GCF is 10.
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The Greatest Common Factor (GCF) of 20 and 36 is: 4
The GCF of 18, 20, and 32 is 2. Factors of 18... 1,2,3,6,9 & 18 Factors of 20... 1,2,4,5,10 & 20 Factors of 32... 1,2,4,8,16 & 32... Therefore the GCF would be 2 !
80
20
The factors of 6 are: 1, 2, 3, 6The factors of 20 are: 1, 2, 4, 5, 10, 20The common factors are: 1, 2The Greatest Common Factor: 2