The GCF of 8 and 15 is 1.
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∙ 10y agoSince 5 is a factor of 15, it is automatically the greatest common factor of the pair.
15 and 30
15 and 30 is just one pair of number that has a greatest common factor of 15
15 and 30
15 and 30 have a GCF of 15. There are other such pairs.
There is no "greatest common multiple" for any pair of numbers. If you meant greatest common factor, the answer is 3.
10 and 15 15 and 20 20 and 25
The greatest common factor of 15 and 105 is 15.