Find the highest common factor (HCF) of 84 and 126.
Note
HCF is found from common prime factors: 84 = 2^2·3·7, 126 = 2·3^2·7, common factors = 2·3·7 = 42.
Find the highest common factor (HCF) of 84 and 126.
HCF is found from common prime factors: 84 = 2^2·3·7, 126 = 2·3^2·7, common factors = 2·3·7 = 42.