Calculate the greatest common divisor (GCD) of 84 and 126.
Note
Using prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7; common factors 2^1·3^1·7 = 42, so GCD = 42.
Calculate the greatest common divisor (GCD) of 84 and 126.
Using prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7; common factors 2^1·3^1·7 = 42, so GCD = 42.