The first step to find the gcf of 85 and 145 is to list the factors of each number. The factors of 85 are 1, 5, 17 and 85. The factors of 145 are 1, 5, 29 and 145. So, the Greatest Common Factor for these numbers is 5 because it divides all them without a remainder.
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The highest common factor of the numbers 65, 156 and 169 is 13.
The greatest common factor of 26 and 65 is 13.13x2=2613x5=65
The greatest common factor of 65 and 99 is 1.
The GCF is 13.
The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The highest factor of any number is itself.