GCF requires 2 numbers to compute.
"What do you have in common?" begs the question "In common with what?"
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15 and any multiple of 15 have a GCF of 15, as do any two multiples of 15 that differ by 15.
Factors for 15: 3, 5 Factors for 36: 2, 3, 4, 6, 9, 12, 18 Highest common Factor: 3
The highest common factor of 60 and 75 is 15
Factors of 8 = 1,2,4,8 Factors of 15 = 1,3,5,15 The highest common factor is 1
The only common factor of 36 and 75 is 3.
We want the GCF or highest common factor of 15 and 24. The factors of 15 and 1,3, and 5.For 24 we have 1,3, 8, 12 and 24.Since 5 is not a factor of 24, the GCF or highest factor is 3