What is the HCF of 189 and 84?

The Highest Common Factor (HCF) of 189 and 84 is the largest positive integer that divides both numbers without leaving a remainder. To find the HCF, you can use the Euclidean algorithm, which involves repeatedly dividing the larger number by the smaller number and using the remainder as the new divisor until the remainder is zero. In this case, the HCF of 189 and 84 is 21.