The common factors are: 1, 2, 3, 4, 6, 12. 12 is the greatest common factor of 72 and 84. All the factors of 12 will therefore divide by both 72 and 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.
The factors of 84 are 1,2,3,4,6,7,12,14,21,28,42 and 84. To find a greatest common factor, you need to compare them to another number's factors.
By prime factoring 84 you get 2x2x7x3. These are all the factors of 84
Since 12 is a factor of 84, all of its factors are common.
Since 21 is a factor of 84, all of its factors are common.
Since 21 is a factor of 84, it is automatically the GCF and all of its factors are common.
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 common factors are: 1, 2, 3, 4, 6, 12. 12 is the greatest common factor of 72 and 84. All the factors of 12 will therefore divide by both 72 and 84.
The common factors of 6, 42, and 84 are numbers that can evenly divide all three of these numbers. The factors of 6 are 1, 2, 3, and 6. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84. Therefore, the common factors of 6, 42, and 84 are 1, 2, 3, 6, and 42.
The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 The factors of 81 are: 1, 3, 9, 27, 81 The factors of 82 are: 1, 2, 41, 82 The factors of 84 are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
The GCF is 21.
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.
The common factors of 21 42 and 84 are 21