The GCF of 42 and 108 is 6
One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42.
The factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.
The common factors are 1, 2, 3, and 6. Therefore, the greatest common factor is 6.
Another way to find the GCF is to break the numbers into their prime factorizations and then multiply the common factors.
2 x 3 x 7 = 42
2 x 2 x 3 x 3 x 3 = 108
Select the common factors.
2 x 3 = 6, the GCF
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Greatest common factor of 420 and 504 is 84.
2
The GCF is 140.
The greatest common factor of the numbers '420' and '2646' is '42'.
The least common multiple of 15 , 20 , 35 = 420