Lowest Common Multiple and Highest Common Factor

Curriculum

7NPV–2: Find the lowest common multiple (LCM) and highest common factor (HCF) of two or more numbers, including using prime factorisation.
Strengthens understanding of number structure and divisibility, supporting efficient calculation, fraction simplification, and problem solving in a range of mathematical contexts.

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Resources

Hugo Cheyneabout 1 month ago

https://www.mathsgenie.co.uk/resources/4-HCF-and-LCM.pdf

Exam-style worksheet with questions on LCM and HCF.

Hugo Cheyneabout 1 month ago

https://corbettmaths.com/wp-content/uploads/2018/11/Common-factors-and-HCF-pdf.pdf

Longer worksheet with problems for finding factors and the highest common factor of two (or three) numbers.

Hugo Cheyneabout 1 month ago

https://www.youtube.com/watch?v=CUEOL3_Wm3Y&ab_channel=mathantics

Simple, short video explaining the highest common factor.

Hugo Cheyneabout 1 month ago

https://www.youtube.com/watch?v=SXPsfr-Fnu4&ab_channel=mathantics

Video showing a method for finding the lowest common multiple using prime factor trees.

Hugo Cheyneabout 1 month ago

https://www.youtube.com/watch?v=Nu6AC6X3_E4&ab_channel=mathantics

Engaging video showing a simple method for finding the lowest common multiple.

Required Topics

Venn Diagrams and Set Notation

Identifying Prime Numbers

Next Topics