O Level Mathematics Day 2/100 | MathiPhy

Welcome to Day 2 of our 100-Day O Level Mathematics Crash Course on MathiPhy! 📚✨ In this lecture, we continue exploring the fundamentals of Numbers (Part 2), covering key concepts like Highest Common Factor (HCF), Least Common Multiples (LCM), and Prime Factorization, along with step-by-step solutions to real past paper-style exam questions. --- 📌 WHAT YOU WILL LEARN IN THIS VIDEO: 00:00 - Introduction & Recap of Day 1 (Number Types: Integers, Primes, Rational vs Irrational) 02:16 - Common Factors & Common Multiples Explained 03:32 - Highest Common Factor (HCF) & Calculation Methods 04:52 - Listing Method vs Prime Factorization Method 08:00 - Least Common Multiple (LCM) Explained 10:46 - 💡 Exam Tip: How to identify whether to use HCF or LCM in word problems 11:45 - Practice Question 1: Irrational Numbers, Integers & Reciprocals 14:34 - Practice Question 2: Large Numbers, Prime Numbers & Cube/Square Numbers 16:29 - Practice Question 3: Expressing Numbers in Index Form & Finding Square Multipliers 20:09 - Practice Question 4: HCF & LCM using Prime Factors (Index Notation) 23:05 - Practice Question 5: Real-World Bus Timetable Application (LCM Problem) 27:08 - Summary & Wrap-Up --- 🎯 KEY TAKEAWAYS: • Grouping / Division Problems ➡️ Calculate HCF • Repetition / Time Interval Problems ➡️ Calculate LCM • Learn how to express numbers as products of prime factors in index form easily. --- 🔔 Subscribe to MathiPhy for daily O Level & IGCSE Mathematics content! 👍 Don't forget to Like, Share, and Comment if you found this helpful! #OLevelMaths #IGCSEMaths #HCFandLCM #PrimeFactorization #MathiPhy #CambridgeMaths #OLevelCrashCourse