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 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 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 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