HCF of 21 and 27

The highest common factor (HCF) of 21 and 27 is 3. To find it, we can list out the factors of both numbers: The factors of 21 are 1, 3, 7, and 21, while the factors of 27 are 1, 3, 9, and 27. The greatest number that appears in both lists is 3! Going a step further, did you know that finding the HCF isn't just about numbers? It has real-world applications in situations like simplifying fractions. By determining the HCF of the numerator and denominator, you can create a simpler, more manageable fraction that's easier to work with in calculations or comparisons. So next time you're faced with a fraction, remember to check for the HCF to make your math life easier!