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
84, 168, 252, 336, 420, 504, 588, 672, 756, +84 . . .
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.
Common factors of 15 and 84 are: 1 and 3.
84