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The common factors are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

Q: What are the common factors of 672 and 84?

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Least common multiple is computed by finding both factor trees and using the greatest power of all common factors factors or 84 are 2,2,3,7 so, [2^2 * 3 * 7] factors of 96 are 2,2,2,2,2,3 so [2^5 * 3] LCM is 2^5 * 3 * 7 = 672 Always check. Divide the answer by the original numbers and check if the quotients are relatively prime. 672 / 84 = 8 672 / 96 = 7 8 and 7 have no factors in common, so this is the answer. If they did have a common factor, you would have to divide by that factor to get the answer, because you had missed one in your factor tree.

As 84 = 14 x 6: All the factors of 14 are common to both, ie the common factors of 14 and 84 are: 1, 2, 7, 14; All the multiples of 84 are common to both 14 and 84, ie the common multiples of 14 and 84 are: 84, 168, 252, 336, 420, 504, 588, 672, 756, 840, ...

The lowest common multiple of 84 and 96 is 672

The greatest common factor of 300 and 672 is 12.

84

The LCM is 672

The factors of 252 are: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252 The factors of 672 are: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 84, 96, 112, 168, 224, 336, 672 The common factors are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84 The Greatest Common Factor: GCF = 84

Common factors of 15 and 84 are: 1 and 3.

The common factors of 28 and 84 are 1,2,4,7,14 and 28

The common factors of 28 and 84 are 1,2,4,7,14 and 28.

84, 168, 252, 336, 420, 504, 588, 672, 756, +84 . . .

Since 21 is a factor of 84, all of its factors are common.