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In Mathematics / Middle School | 2014-06-11

What is the greatest common factor of 42, 126, and 210?

F. 2
G. 6
H. 14
J. 21
K. 42

Asked by Shack88

Answer (2)

prime factors of 42: 2x7x3 prime factors of 126: 2x3x3x7 prime factors of 210: 7x3x5x2 now we multiply all the factors that they all have in common: 2x3x7 which is 42. So the highest common factor is 42

Answered by eboot123 | 2024-06-10

The greatest common factor (GCF) of 42, 126, and 210 is determined to be 42, after identifying and multiplying their common prime factors. The common prime factors are 2, 3, and 7. Thus, the answer is option K: 42.
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Answered by eboot123 | 2024-12-18

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