1.
The numbers 55 and 27 are "relatively prime", meaning they have no common factor other than 1.
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the greatest common factor of 55 and 75 is 5
The greatest common factor (GCF) of two numbers is the largest number that divides evenly into both numbers. In this case, the factors of 55 are 1, 5, 11, and 55. The factors of 5 are 1 and 5. The greatest common factor of 55 and 5 is 5, as it is the largest number that divides evenly into both 55 and 5.
11
The Greatest Common Factor of 165 and 110 are is 55.
The GCF/HCF of 55 and 145 is 5.