Highest Common Factor (HCF) for GCSE Maths: Explanation, Examples and Questions

The Highest Common Factor (HCF) is the largest number that divides two or more numbers exactly, helping simplify fractions and solve problems involving divisors and ratios.

At GCSE level, students learn methods to find the HCF, including prime factorisation and using the relationship between factors and multiples. Mastering this skill is important for a variety of mathematical applications.

The rest of the lesson on the Highest Common Factor is not quite ready, but if you already know what you're doing, we have practice questions linked below.