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The GCF is 3.

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7y ago
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7y ago

GCF(15, 42) = 3.

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Q: Greatest common factor for 15 and 42?
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Factor them. 3 x 5 = 15 2 x 3 x 7 = 42 Select the common factor. The GCF is 3.


What is the greatest common factors of 15 and 42?

15 can be factorized into 3 x 5 42 is factorized as 2 x 3 x 7 Of these factors of these two, greatest common factor is 3. Where as the LCM is found by multiplying the common factor along with non common ones. ie 3 X 2 X 5 X 7 = 210 So HCF or GCF or GCD (Greatest Common Divisor) is 3 Least common multiple is 210