Find the greatest common divisor (GCD/HCF) of 84 and 126.
Note
Using prime factors, 84 = 2^2 × 3 × 7 and 126 = 2 × 3^2 × 7; the common factors give 2 × 3 × 7 = 42, the GCD.
Find the greatest common divisor (GCD/HCF) of 84 and 126.
Using prime factors, 84 = 2^2 × 3 × 7 and 126 = 2 × 3^2 × 7; the common factors give 2 × 3 × 7 = 42, the GCD.