No.
Because 45 is not a factor of 60.
The highest common integral factor is 5, because 25 = 52, five is an integral factor of both 45 and 60, and 25 is not an integral factor of either 45 or 60.
Because 45 is not a factor of 60.
45 doesn't divide into 60 evenly.
the GCF of 45 and 60 is 15
45 doesn't divide into 60 evenly.
The greatest common factor of the numbers 45 and 60 is 15.
For 45, 60, 90 the GCF = 15
15 15*4=60 15*3=45
The Greatest Common Factor of 60, 45, and 30 is 15.
3: 3x20=60 3x15=45 3x24=72
The GCF is 1.