HCF And LCM — Interactive Lesson (Year 10)

HCF and LCM look similar on paper but solve opposite problems, which is exactly why KS4 students mix them up. This HCF and LCM lesson, built as a 16-slide interactive lesson, gives students focused practice telling the two apart and calculating both confidently.

Students find the highest common factor and lowest common multiple of pairs of numbers, using listing and prime factorisation methods, with instant self-marking feedback throughout.

Mastering HCF And LCM in KS4 Maths

This resource covers the KS4 National Curriculum area of number, finding the highest common factor and lowest common multiple of two or more numbers, including using prime factorisation.

What’s Included

• 16-slide fully interactive digital lesson
• HCF and LCM calculation activities using listing and prime factors
• Self-marking questions distinguishing HCF from LCM

Key Benefits for Students

• Builds genuine understanding of when to use HCF versus LCM
• Covers both listing and prime-factorisation methods
• Instant feedback builds exam confidence

Why Teachers Love It

• No prep, self-marking
• Directly supports GCSE exam technique
• Concise lesson fits a single class period

Real-World Uses

HCF and LCM show up whenever things need to be grouped evenly or synchronised — working out when two flashing lights next align, or dividing two lengths of ribbon into equal pieces with none left over.

Love this? You’ll love…

• Scalar Multiplications Of Vectors — Interactive Lesson (KS4)
• Factors And Multiples — Interactive Lesson (KS4)
• Indices — Interactive Lesson (KS4)

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