1, 3, 9
1, 2, 3, 6, 9, 18
1, 2, 3, 6, 7, 14, 21, 42
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The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The common factors of 18 and 24 are 1, 2, 3, and 6, and the GCF is 6.
Yes, 18/42 = 9/21
Yes, 3 a common factor of 9 18 and 42
The factors of 39 are: 1, 3, 13, 39 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
Common factors of 9 and 18 are: 1, 3, and 9.