Find the highest common factor (HCF/GCD) of 84 and 126.
Note
Prime factors: 84 = 2^2 × 3 × 7, 126 = 2 × 3^2 × 7; common product = 2 × 3 × 7 = 42, the HCF.
Find the highest common factor (HCF/GCD) of 84 and 126.
Prime factors: 84 = 2^2 × 3 × 7, 126 = 2 × 3^2 × 7; common product = 2 × 3 × 7 = 42, the HCF.