Find the greatest common divisor (GCD) of 84 and 126.
Note
Factor 84 = 2^2·3·7 and 126 = 2·3^2·7; the common factors are 2·3·7 = 42, so GCD = 42.
Find the greatest common divisor (GCD) of 84 and 126.
Factor 84 = 2^2·3·7 and 126 = 2·3^2·7; the common factors are 2·3·7 = 42, so GCD = 42.