Determine the highest common factor (HCF) of 84 and 126.
Note
Prime factorization gives 84 = 2^2·3·7 and 126 = 2·3^2·7, so HCF = 2·3·7 = 42.
Determine the highest common factor (HCF) of 84 and 126.
Prime factorization gives 84 = 2^2·3·7 and 126 = 2·3^2·7, so HCF = 2·3·7 = 42.