Find the highest common factor (HCF) of 48 and 180.
Note
Prime factorize: 48 = 2^4 × 3, 180 = 2^2 × 3^2 × 5; the common factors are 2^2 × 3 = 4 × 3 = 12, so HCF = 12.
Find the highest common factor (HCF) of 48 and 180.
Prime factorize: 48 = 2^4 × 3, 180 = 2^2 × 3^2 × 5; the common factors are 2^2 × 3 = 4 × 3 = 12, so HCF = 12.