Number System HCF & LCM Part 2 Class 6 to 10 Maths Rajesh Jogi Maths Academy

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Every topic is taught at the concept level, so students truly understand WHY, not just HOW. This approach prepares students for Class exams today and IIT-JEE tomorrow.

📚 We cover Class 6 to 10 — integrating CBSE, State Board, and ICSE textbooks chapter by chapter, so no student is left behind regardless of their board.

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📘 IN THIS VIDEO
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Today's topic: HCF & LCM — Practice Problems | Class 6 to 10 Maths
- Finding two numbers when Ratio and HCF are given
- Sum of two numbers with HCF — finding all possible pairs
- Smallest/Largest number leaving a fixed remainder (LCM method)
- Odd number of factors → Perfect Square condition
- Counting Perfect Square Factors using Prime Factorization

📝 PRACTICE QUESTION PAPER / WORKSHEET (free download):
👉 Practice paper:https://drive.google.com/file/d/1jHWs7iaiggwZur4y8216AUD9nW87h8Vh/view?usp=sharing
▶️ RELATED VIDEOS:
- Previous lesson:https://youtu.be/LCYMy0HJVb0
⏱️ TIMESTAMPS:
0:00 Introduction: Ratio & HCF Problem
0:31 Key Concept: Numbers = HCF × Coprime Pairs
1:04 Finding the Two Numbers: 36 and 48
1:18 Finding LCM Using HCF
1:43 Question 6: Sum = 168, HCF = 12
2:09 Setting Up the Equation
2:32 Finding All Coprime Pairs
3:14 All Possible Answers: (3,11), (9,5), (1,13)
3:56 Question 8: Smallest Number with Remainder 8
4:42 Solution: LCM = 540, Answer = 548
5:21 Variation: Largest 3-Digit Number
5:52 Question 10: Odd Number of Factors — Find n
6:14 Key Rule: Odd Factors = Perfect Square
7:00 Why n Has No Solution Here
7:31 Variation: When 5² is Given
7:55 How Many Factors of n are Perfect Squares?
8:23 Listing Even-Power Combinations
9:11 Counting Perfect Square Factors
10:02 Closing & Doubts

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Видео Number System HCF & LCM Part 2 Class 6 to 10 Maths Rajesh Jogi Maths Academy канала Rajesh Jogi Maths Academy