It is 1 because 71 is a prime number
The greatest common factor of 90 , 77 = 1
The greatest common factor of 90 , 112 = 2
The greatest common factor of 54 , 90 = 18
The greatest common factor of 1925 , 90 = 5
The greatest common factor of 24 , 90 = 6
The greatest common factor of 90 and 243 is 9.
The greatest common factor of 90 and 130 is 10.
The Greatest Common Factor for 90 and 105 is 15.
The greatest common factor of 99 and 90 is 9.
The greatest common factor of 48 and 90 is 6.
Since 18 is a factor of 90 and it is the largest factor of itself, the greatest common factor of 18 and 90 is 18.Since 18 is a factor of 90, it is automatically the GCF.