What is the HCF of 50 and 45?

The Highest Common Factor (HCF) of 50 and 45 is 5. To find the HCF, you can list the factors of each number and identify the greatest number that divides both 50 and 45 without leaving a remainder. In this case, the common factors of 50 are 1, 2, 5, 10, 25, and 50, while the common factors of 45 are 1, 3, 5, 9, 15, and 45. The highest common factor among these is 5.