The GCF of 10, 20, 35, and 55 is 5.
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The greatest common factor (GCF) of 20 and 30 is 10.
The Greatest Common Factor of 20 and 90 is 10, because the factors of 20 are: 20:1,2,4,5,10,20 The factors of 90 are: 90:1,2,3,5,6,9,10,15,18,30,45,90 So, the common factors are 1,2,5,10 10 is the greatest number of them so 10 is the Greatest Common Factor. THE ANSWER IS 10
The greatest common prime factor of 10 and 20 is 5.
The greatest common factor of 10 and 20 is 10.
GCF(10, 20) = 10.