LCM and HCF || Shortcuts & Tricks for Aptitude Tests (India)

In this video, we learn how to find LCM and HCF, something very important, as far as aptitude tests are concerned. And you will not just learn how to find the LCM or HCF, but with the tips and tricks you learn in this video you can find the LCM or HCF for a set of numbers quickly with no or minimum use of pen and paper. And that is important, for at least two reasons.

One, the ability to work with numbers in your head is like a superpower. It gives you a mighty advantage over others who don’t have it.

Two, LCM and HCF are very important concepts. In addition to the questions based directly on them, you’ll be using LCM/HCF all the time while working with questions from other areas like fractions, ratios, percentages, work and time and more.

So, if you want to do well on an aptitude test, you better master the concepts of LCM and HCF.

►Watch the video on Solving Problems on LCM and HCF (with important questions for Aptitude Tests) -

Timestamps
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01:25 - HCF - The concept
02:25 - Mental method to find the HCF
04:36 - Trick 1 - Shorten the list (HCF)
06:07 - Trick 2 - Remove the obvious common factor (HCF)
07:53 - Trick 3 - Find the HCF using the differences between the numbers
10:04 - Trick 4 - Finding the HCF when there is a prime number
11:18 - LCM - The concept
12:13 - Mental method to find the LCM
13:53 - Trick 5 - Shorten the list (LCM)
15:25 - Trick 6 - Remove the obvious common factor (LCM)
16:42 - Trick 7 - Finding the LCM when the numbers are co-prime

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