That would be 15.
Only a number ending in five would be a factor of 75. 45 is not. 35 is not. 25 is not. 15 is, and it also is a factor of 90. This makes it the highest common factor of 75 and 90, although it is not a prime factor.
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The highest common factor is 15
obviously, its highest common factor is the number itself. so the answer here is 90.
The greatest common factor of 60, 75, and 90 is 15.HOPE THIS HELPS!:D:D:D:):)
The GCF is 15.
The GCF is 5.