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Q: Is 12 a prime factor of 84?

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12 is a composite number, not a prime factor.

84 42,2 21,2,2 7,3,2,2

Since 12 is a factor of 84, it is automatically the GCF.

The GCF of 48 and 84 is 12. One way is to list all the factors of both numbers and compare them. The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48. The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84. The common factors are 1, 2, 3, 4, 6, and 12. Therefore, the greatest common factor is 12. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 48 are 2, 2, 2, 2, and 3. The prime factors of 84 are 2, 2, 3, and 7. The prime factors they have in common are 2, 2, and 3, so the greatest common factor is 2 x 2 x 3 = 12

The greatest common factor of 12 66 and 84 is 6.

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The largest prime factor is 7.

7 is the greatest prime factor of 84.

2 84 3 12 3 4 2 2

The LCM of 12 and 21 is 84. To find the LCM, prime factor both numbers then multiply each factor the most times it was used in either number.12=2x2x321=3x7lcm=2x2x3x7=84The Least Common Multiple (LCM) for 12 21 is 84.

12 is a composite number, not a prime factor.

84 42,2 21,2,2 7,3,2,2

7 is the largest prime factor in 84. The prime factors of 84 are 22 x 3 x 7.

Since 12 is a factor of 84, it is automatically the GCF.

The GCF of 48 and 84 is 12. One way is to list all the factors of both numbers and compare them. The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48. The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84. The common factors are 1, 2, 3, 4, 6, and 12. Therefore, the greatest common factor is 12. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 48 are 2, 2, 2, 2, and 3. The prime factors of 84 are 2, 2, 3, and 7. The prime factors they have in common are 2, 2, and 3, so the greatest common factor is 2 x 2 x 3 = 12

7

Seven

The greatest common factor of 12 66 and 84 is 6.

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