The HCF of 10 15 and 20?

Well, isn't that a happy little question! The Highest Common Factor (HCF) of 10, 15, and 20 is 5. Just like how we blend colors on our canvas, the HCF is the largest number that divides evenly into all three numbers, bringing harmony and balance to our mathematical landscape. Remember, there are no mistakes, only happy little accidents in math and art.