Question

QS. H.CF of -
. 42,84 only
By Prime Factorization Methes​

Answer 1

Prime Factorization of 84

Prime factors of 84 are 2, 3, 7. Prime factorization of 84 in exponential form is:

84 = 22 × 31 × 71

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1, 2, 3, 6, 7, 14, 21

Factors of 84

List of positive integer factors of 84 that divides 42 without a remainder.

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42

Greatest Common Factor

We found the factors and prime factorization of 42 and 84. The biggest common factor number is the GCF number.

So the greatest common factor 42 and 84 is 42.

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Answer 2

Answer:

42

Step-by-step explanation:

The prime factorization of 42 is: 2 x 3 x 7

The prime factorization of 84 is: 2 x 2 x 3 x 7

The prime factors and multiplicities 42 and 84 have in common are: 2 x 3 x 7

2 x 3 x 7 is the hcf of 42 and 84

hcf(42,84) = 42