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The GCF of 15 and 36 is 3

Find your factors for each number

36: 6*6,3*12,9*4,18*2,1*36

15: 3*5,1*15

list the common factors (the ones that are the same for each)

1,3

and find the greatest (largest)

GCF for 36,15 is 3
3

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Q: What is the greatest common factor of 15 and 36?
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