The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30
The factors of 84 are:
1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
The factors of 126 are:
1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
The common factors are:
1, 2, 3, 6
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The greatest common factor of the numbers 30, 84 and 126 is 6.
Since 12 is a factor of 84, all of its factors are common.
The factors of 15 are: 1, 3, 5, 15 The factors of 126 are: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
42, 84 and 126
42, 84, 126 and so on.They are 42 and multiples of 42