Find the greatest common divisor (GCD) of 84 and 126.
Note
Use prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7; multiply common lowest powers 2·3·7 = 42, so the GCD is 42.
Find the greatest common divisor (GCD) of 84 and 126.
Use prime factors: 84 = 2^2·3·7 and 126 = 2·3^2·7; multiply common lowest powers 2·3·7 = 42, so the GCD is 42.