The highest common factor of all four numbers is 7
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 105 are: 1, 3, 5, 7, 15, 21, 35, 105
The factors of 28 are: 1, 2, 4, 7, 14, 28 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 63 are: 1, 3, 7, 9, 21, 63
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70
The factors of 7 are: 1, 7 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70
-- The factors of 12 are 1, 2, 3, 4, 6, and 12 .-- The factors of 35 are 1, 5, 7, and 35 .-- The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42 .-- The common factors of 12, 35, and 42 are 1, . . . oh, there aren't any others besides ' 1 '.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The composite factors from this list are 6, 14, 21, and 42.
The factors of 28 are: 1, 2, 4, 7, 14, 28 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70
The factors of 7 are 1 and 7. Neither of them are multiples of 42. Put the other way, 7, 14, 21 and 42 are multiples of 7 that are factors of 42.
1, 2, 3, 6, 7, 14, 21, 42 1, 2, 5, 7, 10, 14, 35, 70
14: 1, 2, 7,14 35: 1, 5,7, 35 84: 1, 2, 3, 4, 6, 14, 21 ,28, 42, 84
The composite factors of 42 are: 6, 14, 21, 42.
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70 The factors of 98 are: 1, 2, 7, 14, 49, 98