List the multiples.
15, 30, 45, 60, 75
20, 40, 60, 80
The LCM is the first number that appears on both lists.
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Since 15 is a factor of 60, it is automatically the GCF.
Since 60 is a multiple of 15, it is automatically the LCM.
The least common factor of any set of numbers is 1.
The GCF and the LCM of 15 and 60 is 15 and 60, respectively.
The GCF is 5. The LCM is 60.
5 and 60 have a gcf of 5 and a LCM of 60
The multiples of 15 are 15, 30, 45, 60, 75, 90 The LCM of 15 and 90 is 90. The factors of 15 are 1, 3, 5, 15 The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 The GCF is 15.
The LCM is 1260. The GCF is 12.
Since 15 is a factor of 60, it is automatically the GCF.