What is the HCF of 35 and 80?

The Highest Common Factor (HCF) of 35 and 80 is the largest number that divides both 35 and 80 without leaving a remainder. To find the HCF, you can use the Euclidean algorithm, which involves dividing the larger number by the smaller number and then dividing the divisor by the remainder until the remainder is zero. The HCF of 35 and 80 is 5.