Find the highest common factor (HCF) of 84 and 126
Note
Using prime factors or the Euclidean algorithm, 84 = 2^2×3×7 and 126 = 2×3^2×7, so common factors multiply to 2×3×7 = 42.
Find the highest common factor (HCF) of 84 and 126
Using prime factors or the Euclidean algorithm, 84 = 2^2×3×7 and 126 = 2×3^2×7, so common factors multiply to 2×3×7 = 42.