Determine the highest common factor (HCF) or greatest common divisor (GCD) of 84 and 126.
Note
The GCD is found from prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7, so the common factors are 2·3·7 = 42.
Determine the highest common factor (HCF) or greatest common divisor (GCD) of 84 and 126.
The GCD is found from prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7, so the common factors are 2·3·7 = 42.