Prime Factors, HCF and LCM Explained | Checkpoint - IGCSE - O-Level Edexcel 2027 💯

Welcome! In this video we explain Prime Factors, HCF and LCM step by step 🔢 Perfect for Year 8 Checkpoint, Year 9 Core, and Year 10 O-Level Edexcel students 👇 ✅ What are Prime Factors & Prime Factorization ✅ Using the Factor Tree method ✅ How to find the HCF (Highest Common Factor) ✅ How to find the LCM (Lowest Common Multiple) ✅ Solved exam-style questions for all levels Simplified and organized for Checkpoint – IGCSE – O-Level Edexcel 2027, so you understand it right and score full marks 💯 Don't forget: 👍 Like the video 🔔 Subscribe & turn on notifications ✍️ Drop your questions in the comments ____________________________________________ 00:00 🎬 Intro 00:15 📌 The basics: natural numbers, integers, primes 00:58 📌 What is a prime number? 02:10 📌 Factors and multiples 03:53 📌 HCF & LCM — what they mean 04:22 📌 The Stick Method (fastest way in the exam) 04:32 💡 Example: HCF & LCM of 24 and 36 06:04 💡 The H shape & the L shape → HCF = 12, LCM = 72 06:47 💡 Example: HCF & LCM of 20 and 6 08:32 📌 Prime factorisation with the factor tree 09:39 💡 Circle the primes → 2² × 3² 10:40 💡 Harder: express as a product of prime factors 12:17 💡 Exam question: HCF & LCM with the Stick Method 13:25 💡 HCF = 16 from the H shape 13:41 💡 LCM from the L shape 14:04 💡 Write as a product of prime factors → 2³ × 5 15:13 📌 Numbers already given in prime factor form 16:51 💡 Method 2: compare the powers (the faster one) 17:00 💡 HCF: common primes with the LOWEST power 17:30 💡 LCM: common primes with the HIGHEST power 18:37 🏁 Outro: practise this topic a lot ____________________________________________________________________________ prime factors, hcf and lcm, hcf, lcm, prime factorization, highest common factor, lowest common multiple, prime factors hcf lcm, year 8 checkpoint maths, year 9 core maths, year 10 o-level maths, o-level edexcel maths, hcf and lcm checkpoint, prime factors igcse, hcf lcm o-level, checkpoint maths, edexcel maths, factor tree, maths year 8, maths year 9, maths year 10, cambridge checkpoint maths, igcse maths, hcf and lcm explained, prime factors explained, international maths _________________________________________________ #Prime_Factors #HCF_and_LCM #Checkpoint_Maths #IGCSE_Maths #OLevel_Edexcel