To study LCM and HCF, i.e. Least Common Multiple, and Highest Common Factor...
We need to first learn what Multiples and Factors are.. and what is the difference between them
After that, we learn how to find HCF - or also called - GCD: Greatest Common Divisor
Then, we learn how to find Least Common Multiple.. i.e. LCM
Finally, comes the biggie: How to know when to calculate LCM, or HCF... it's not that complicated!
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0:00 Factors and Multiples - Meaning and Difference
2:34 HCF - Definition and Examples
5:07 LCM - Definition and Examples
7:29 When to use LCM or HCF?
10:58 A question for you!