Lowest Common Multiple (LCM) & Highest Common Factor (HCF)
These lessons, with videos, examples and step-by-step solutions, help GCSE Maths students learn how to find the highest common factor (HCF) and lowest common multiple (LCM).
The following diagrams show how to find the lowest common multiple and highest common factor. Scroll down the page for more examples and solutions on lowest common multiple and highest common factor.
Printable & Online Factors & Multiples Worksheets
How to work out HCF and LCM using short division or ladder method?
How to work out the Highest Common Factor and Lowest Common Multiple using short division?
Useful for quick calculations where a factor tree isn’t required. GCSE.
Example:
Find the HCF and LCM of 108 and 24.
How to find HCF and LCM using the ladder method?
This video will teach you how to find the highest common factor (HCF) and lowest common multiple (LCM)
for 2 numbers.
Example:
Find the HCF and LCM of 24 and 36.
Finding the LCM using the “Ladder” Method
Example:
Find the LCM of 16 and 40.
Finding the GCF using the “Ladder” Method
Example:
Find the GCF and LCM of 24 and 40.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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