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Problem solving - factors, multiples, primes

Use LCM and HCF to solve problems in a given context

3 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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Grade 3–6 Core 🇬🇧 UK

HCF/LCM - GCSE Maths

1st Class Maths 273K views

Clear GCSE walkthrough of HCF and LCM including contextual word-problem examples.

Jump to 0:10Finding the HCF 2:54Finding the LCM 4:20Contextual Examples 8:57Using Prime Factorisation

Grade 3–5 Core 🇺🇸 US

LCM and GCF word problems | Factors and multiples | Pre-Algebra | Khan Academy

Khan Academy 752K views

Works through LCM and HCF word problems step by step, exactly matching this objective.

Grade 3–6 Core 🇬🇧 UK

Finding the HCF and the LCM

Maths Genie 276K views

Thorough Maths Genie tutorial on finding the HCF and LCM with worked examples.