LCM (Least Common Multiple) || Introduction || Lesson-1

[@atheisttttt]

Shortcut Explained: *Case 1* : no prime numbers present choose the largest number and check if it's divisible by all remaining numbers - if yes , then it's the LCM if no , then multiply it by 2 and check again if still not divisible , then multiply it by 3 and check again Repeat until it is divisible by all other numbers eg 12 6 24 8 *Case 2* : if prime present + other number are not divisible by it ( or in other words, other number is not a multiple of seven ) Example 1 : 4 6 7 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of seven ) - hence keep it (aside) Between 4 and 6 - 6 is greater which is not divisible by 4 6*2 = 12 is divisible by 4 So LCM = 12 * (7) = 84 Example 2 : 7 10 12 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of 7 ) - hence keep it (aside) Between 10 and 12 - 12 is greater but not divisible by 10 Then if we keep multiplying 12 by x1 x2 x3 x4 We will get 12x5=60 which is divisible by 10 So LCM = 60 * (7) = 420 *Case 3* : if prime present + other number are divisible by it ( or in other words, other number is a multiple of seven ) Then DO NOT keep it aside. Proceed normally like case 1 Example 1 : 7 8 14 7 is prime but 14 is divisible by seven ( or is a multiple of 7 ) Hence do not keep it aside.

[@supreeth69]

Thanks for this.

[@YUVARAJN-xc9mm]

thank you so much...

[@naazirayash9139]

sir in a short cut method you said take prime number separetly and multiple by the highest number but in eg. 3 and 4 there is also a prime number present there like 3 ...3 is also a prime number category ...in that case what should have we to do...please take it seriously and i hope yo will reply back and give appropraite answer which have we need

[@codecy1374]

@@naazirayash9139 Bro ... in Eg 3 : 12, 3, 9 . Prime number is 3 but still 12 can be divided by 3(So dont consider 3 as prime number) So u can solve in the same manner u did for above 2 examples. in Eg 4: *3, 11, 12*. Prime No. are 3 & 11. But the remaining number (12) is divisible by 3 (so dont consider 3 as prime number here). But 12 is not divided by 11 (so consider 11 prime number & solve in the same manner like sir did)

[@srinithithirupathi8114]

Thank you

[@vaishnaviravuri3184]

Sir, at 18:56, you mentioned that there are no prime numbers. However, 3 is prime.

[@trahadiramani6072]

same ques

[@sscwithm]

sir is just recording what he memorised in his mind this is the reason he made this big mistake.Don't know why people like such videos

[@shivanithish6061]

see even though 3 is a prime number it 12 is divisible by 3 , so just dont see in the basis of prime numbers just look wheather it is divisible by the highest number or not

[@techpanda237]

😊​@@shivanithish6061

[@bharathraju5866]

@@sscwithm you dont have enough knowledge to understand the subject and blaming . dont know why people like you exist

[@naazirayash9139]

may almighty bless you sir . i think in my whole life i never see like you any tutor who provides just like lectures free of cost .i wish i would be like you

[@manneratnakumari4464]

Sir in 3rd and 4th question '3' is also a prime number

[@arockiavimalan3131]

Yeah .I also tried for finding the lvm by shortcut method .but it didn't work out. See 12,3,9 Pick 3 separately since it is prime 9,12 Highest no=12,(12/9=not divisible) 12×2=24,(24/9=not divisible) 12×3=36,(36/9=divisible) 36 is LCM for other 2 nos Check for 3×36 =108= LCM. But not correct . Rather find lcm for both 36(I.e LCM of other no's) and 3(prime no) LCM =36

[@atheisttttt]

Shortcut Explained: *Case 1* : no prime numbers present choose the largest number and check if it's divisible by all remaining numbers - if yes , then it's the LCM if no , then multiply it by 2 and check again if still not divisible , then multiply it by 3 and check again Repeat until it is divisible by all other numbers eg 12 6 24 8 *Case 2* : if prime present + other number are not divisible by it ( or in other words, other number is not a multiple of seven ) Example 1 : 4 6 7 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of seven ) - hence keep it (aside) Between 4 and 6 - 6 is greater which is not divisible by 4 6*2 = 12 is divisible by 4 So LCM = 12 * (7) = 84 Example 2 : 7 10 12 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of 7 ) - hence keep it (aside) Between 10 and 12 - 12 is greater but not divisible by 10 Then if we keep multiplying 12 by x1 x2 x3 x4 We will get 12x5=60 which is divisible by 10 So LCM = 60 * (7) = 420 *Case 3* : if prime present + other number are divisible by it ( or in other words, other number is a multiple of seven ) Then DO NOT keep it aside. Proceed normally like case 1 Example 1 : 7 8 14 7 is prime but 14 is divisible by seven ( or is a multiple of 7 ) Hence do not keep it aside.

[@nallagatlaprasanthi4805]

Yes..u r correct.. nobody observe this.

[@chiranjeevikumarbattula8709]

Max 90% only apply shortcut method 12,3,9 is an example of remaining 10%

[@chiranjeevikumarbattula8709]

Apply long division method

[@pavankohli5578]

I think this is the best class for LCM in KZbin

[@FeelFreetoLearn]

I’m glad you think that way, thank you sir.

[@laxmanjotennavar9483]

You're teaching skills are incredible sir. From you sir we have two benefits one is we learn aptitude step by step and another one is we learn English so easily...

[@FeelFreetoLearn]

I am obliged to your gratitude and kindness. Thank you sir.

[@lijoblr]

@@FeelFreetoLearn sir please dont think I am arrogant or anything but it is said like 2 raised to the power of 3 or 4 etc

[@arifulislamapu36]

​@@FeelFreetoLearn❤❤❤

[@adfarhussain8632]

​@@FeelFreetoLearn apply prime no.method in question 3...same question is asked by many students why u are not responding to it ....

[@shravanshetty8115]

Naa louda am kadhu first 3 is prime number kadhu anti 3,4 answer malli chepu​@@FeelFreetoLearn

[@sayibpanickar739]

I don't have enough words to express my gratitude..thankyou sir quants was always a really troublesome section for me..but your vedios helped me a lot.Today everyone is trying hard to promote their paid courses here you are giving this amazing sections thats too totaly free of cost & some of these vedios are way better than paid courses..I wish i could be at your doorsteps oneday to take your blessings after i get my first job...thankyou again sir.may god bless you with good health & happiness...

[@KOTTE_SUNNY]

I never had best teaching in my life TQ sir which is your dedication and spreading by quality of knowledge...

[@tulipansari610]

Sir you are the best teacher for teaching maths for competitive exams. The most important thing is that you teach in a very patient manner. Therefore slow and dumb students like me can easily understand and grasp the concept.

[@zahid_9217]

Sir the lecture was comprehensive really but I got so confused in 3 as 3 is the prime no

[@studyportal2859]

Yes same confusion 3 is prime no

[@sivamummadisetti]

​ @AC18UCS031 Gopal G No, we have to check whether the prime number is a factor of the biggest number or any of the multiples of the biggest number. If no then we have to keep it aside and multiply...

[@bhavanisingh5944]

Sir I am in 7 class

[@arunkumarrachannavar7776]

same doubt i have,plz any one

[@nontechayush648]

Yes exactly

[@srikark2963]

sir in shot cut method 3 example : 3 is a prime number

[@bharathi2896]

I also have the same doubt... Sir, will u explain in the 3rd example 3 is also a prime number 🤔

[@phoebekarens4631]

Sir, could you explain ?

[@manibhushanreddypeddamallu6164]

Sir can you explain 3rd example it has 3 prime number

[@pradyumnatechworld9414]

Sir this video is ausump I was confused with this L.C.M Topic you only cleared thank you very much

[@veeralogics]

Simply super...chala clear ga explain chesaru sir 👌👌👍👍

[@FeelFreetoLearn]

Thank you for the kindest remarks sir.

[@rekhagupta-kk2ph]

I am from Nepal and I am preparing for lok sewa and your videos are really very helpful sir. Thank u soo much🙏🙏🙏

[@FeelFreetoLearn]

You’re welcome madam.

[@rithika-nk1ws]

Hello Sir, I have to thankyou for your free lectures and the patience with which you teach us is so commendable. Teaching from the basics ! Thanks alot Sir.

[@katyaynidhingra5627]

Your way of teaching is very good...meri daughter ko ekdam samajh aa gaya concept of LCM ...she is in 5th standard... Thanks

[@katyaynidhingra5627]

Very useful...really appreciate your way of teaching

[@FeelFreetoLearn]

Koi Baat nahi hai ji, mujhe kush hai ki aapne isse upyogi paaya.

[@Sunflower-wv9wb]

Nice class sir, very helpfull, Can understand easily, thank you very much sir🙏🏻

[@Saurabh14000]

Best teacher ... explain basic method from zero level ... thank you sir ...you teach very superb 👌👌

[@FeelFreetoLearn]

Thank you very much for your valuable feedback sir.

[@Saurabh14000]

@@FeelFreetoLearn sir i like the way you solve every question from basic method ... i m your follower from 3 years.

[@SMRTELUGUEDUCATION]

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[@dayanaflorence7800]

I m learnt more and more after watching dis video... Vry useful to me... Thank u sir.....

[@reddy.......]

In short cut method 3rd example 3 is a prime number, as per ur explanation the third question answer is 108 sir. Please give me the reply as soon as possible.

[@vikaschouhan7322]

Yes , absolutely right

[@HarishHarish-qy8yn]

Yes ur corect

[@backstabberbro]

but its wrong since 36 is the actual LCM but the explaination is having very smooth ghapla the real explanation of short cut method is not there. The best shortcut is to learn the Long-division method which solves 100% problems and listen to your instincts that is developed by practice.

[@atheisttttt]

Shortcut Explained: *Case 1* : no prime numbers present choose the largest number and check if it's divisible by all remaining numbers - if yes , then it's the LCM if no , then multiply it by 2 and check again if still not divisible , then multiply it by 3 and check again Repeat until it is divisible by all other numbers eg 12 6 24 8 *Case 2* : if prime present + other number are not divisible by it ( or in other words, other number is not a multiple of seven ) Example 1 : 4 6 7 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of seven ) - hence keep it (aside) Between 4 and 6 - 6 is greater which is not divisible by 4 6*2 = 12 is divisible by 4 So LCM = 12 * (7) = 84 Example 2 : 7 10 12 7 is a prime and other numbers are not divisible by seven ( or they are not a multiple of 7 ) - hence keep it (aside) Between 10 and 12 - 12 is greater but not divisible by 10 Then if we keep multiplying 12 by x1 x2 x3 x4 We will get 12x5=60 which is divisible by 10 So LCM = 60 * (7) = 420 *Case 3* : if prime present + other number are divisible by it ( or in other words, other number is a multiple of seven ) Then DO NOT keep it aside. Proceed normally like case 1 Example 1 : 7 8 14 7 is prime but 14 is divisible by seven ( or is a multiple of 7 ) Hence do not keep it aside.

[@nallagatlaprasanthi4805]

U r correct ...but sir not giving explanation for the questions...

[@ezhilvathani4669]

question 3 in short cut method 3 is prime number right? Confused can u clarify sir

[@sonalisonar2333]

Sir...I have watched your all videos uptill now , my basic concepts were not clear..now it is crystal clear m happy ... m speechless no words for your Hard work n efforts many students like me without coaching are dependent on you...hats off keep it on your are really doing great job 👍

[@FeelFreetoLearn]

Your kind words and remarks are my inspiration, thank you madam.

[@tanishqsatheesh61]

00:06 Introduction to LCM and its importance in competitive exams. 02:07 Learn multiple methods to find LCM. 04:05 Finding the least common multiple (LCM) of multiple numbers. 06:15 Traditional and factorization methods for finding LCM 08:11 Explaining how to find the LCM using factorization method 10:02 Finding LCM using factorization method 11:56 Start with the smaller number when finding LCM 13:47 Long division method is essential for finding LCM 15:47 Identify the LCM by checking for divisibility 17:42 Finding LCM by checking divisibility of numbers 19:32 Finding LCM using division method 21:13 To find the lcm, practice is key.

[@akhilr5445]

Xlent xplaination sir😍 Thnq very much 🙏

[@FeelFreetoLearn]

You’re welcome sir.

[@sujatapradhan9490]

Thank you sir.sir your teaching is so amazing . I loved you teaching.

[@umeshnayak1910]

These videos of various topics are really helpful for those who are preparing for various exams. And it is a small thing to thank you people(your team) for making this and your vision. I hope you people will reach the your abnormous goal.

[@mohdmurtazaalikhan99]

Sir i give u 100 out of 100....your videos to the point... I have no words to explain.....

[@FeelFreetoLearn]

Your kind feedback is my inspiration sir.

[@cespak1811]

What a great teacher you are. Blessings to you

[@Cherrylin101]

I just wanna say thank you for your explanation on LCM because this really helped me when I did not understand it

[@Tygaming3688]

I finally found the Indian guy on KZbin

[@richasharma-el6ns]

But 3 IS a prime number.

[@PRASHANTKUMAR-su9bx]

3*12=36

[@Durga-jh2eb]

@@PRASHANTKUMAR-su9bx Could u explain clearly?

[@ITS_ME_PRAGATHI_2406]

3 is a prime number, but 12 can divisible by 3

[@ITS_ME_PRAGATHI_2406]

If higher number is not divisible by prime.. then keep the prime a side then.. multiple the prime with final number which is divisible by all other numbers ❤

[@ITS_ME_PRAGATHI_2406]

Hope u guys are understand ❤❤

[@imranomar207]

GOOD VERY CLEAR ABOUT L C M THANKS AND KEEP IT UP

[@sureshravichandran2254]

really awesome this section sir. it was very good for me

[@ezenglish100]

Wonderful method sir ... I appreciate your method and you ❤

[@kumarmonu1559]

Waoooo great explanation sir..... what's fantastic

[@arunyadav5334]

It's great to find and happy to have the topics..tq

[@djagadeeshjagadeesh6402]

Wow sir you are teaching very well 👏 thank you sir thank you very much sir 🙏 😊

[@Manureddy220]

Super sir very best sir teaching very very super sir..... Thank you sir 👍👍

[@rishiyadagiri5800]

Sir Your are the best Solution for beginners and learners 🙏🙏..

[@FeelFreetoLearn]

I’m grateful for your kind remarks, Thank you sir.

[@abhisheksahani7520]

Best learning technique,A lot's of Love ❤️❤️❤️❤️ sir

[@IreneCool]

I’m 5th grade but I still understood whatever he said! You are a good teacher

[@teluguemploymentnewsadda6328]

Sir you are a god to me,plz providing more videos for non maths students

[@pratyushakunche8063]

Tquu so much sir ..nice explaination and very easy to understand

[@FeelFreetoLearn]

I’m glad you found my channel amiable, you’re most welcome madam.

[@sunithasb4441]

In shortcut method question number 3 contains 3 and it is prime number

[@lakshmipalahniuk4627]

Ur teaching in mind blowing 🎉🎉

[@barshapriyadarshini7589]

I'm preparing for some State exams...and...i have already covered all the topics... it's as usual just most easiest way to understand thank you so much sir ....for you efforts... 🙏

[@aarifitoo1862]

Thnku sir To b honest ,,i had a mathematics phobia,but watching ua videos makes me the phillic towards it

[@letstryondhsala]

3 is also prime number ryt?

[@lawdigest9265]

Kaash sir aap pehle mile hote ....toh main Bsc main fail Naa hota ....maths favourite bn rha h mera apko videos dekhke . Wonder teacher🙏

[@adinarayanav3317]

I love your videos very much you are teaching great a billion thanks to you sir

[@FeelFreetoLearn]

Your kind words and remarks are my inspiration, thank you sir.

[@afshanamanzoor7978]

Superb explanation....thank you so much sir

[@backstabberbro]

sir please explain why 3 is not a prime number in your example Time - 20:26 and 18:52

[@AbdulRasoolHakeem]

Completed successfully on 19 th November 2024 sir. Thank you so much sir.

[@sarahelewisy6418]

NUMBER 3 IS A PRIME NUMBER WYM?

[@tusharanand3743]

3 is prime number, though great explanation sir, I was waiting for this video

[@rutujapatil5039]

Thank you so much sir! You are making our lives more easier🙌

[@FeelFreetoLearn]

You’re most welcome madam and Thank you for the kind words.

[@umarabdulqahaar6685]

Thx sir u make my work easy

[@elsoremyarajan3958]

Excellent session sir..Thank u so much sir..Keep going like this

[@FeelFreetoLearn]

You’re most welcome and thank you for the kind remarks madam.

[@mohindra_yarlagadda]

you're awesome sir.. thanq so much..

[@gopikrishnanm5310]

18:56 sir 3 is a prime no,

[@gopalchalotra7848]

You teach really too good and I really thank you sir for this amazing video 🙏 my doubts related to LCM got clear after watching this video

[@MsVlogs17502]

Sir,3rd question there is also prime number i.e 3 hence 3 multiply 12 equals to 36

[@hemalathaneelakantam2452]

Short cut method is soo helpfull for us sir, tq sir for your valuable teaching

[@Sirigowda2580]

What about 3 .... Plz clarify this doubt... In question number 4 ) 3 11 also a prime number but you focused on 11 why not on 3

[@raunakchavan4611]

Sir you are not ordinarily human being 🤩 You are just awesome Thank u sir.....

[@FeelFreetoLearn]

I’m grateful for your kind words, Thank you sir.

[@padminikalburagi1783]

Thank you so much sir...ur teaching is just mind-blowing🔥🙏

[@FeelFreetoLearn]

Thank you madam, those are some really kind words you could spare.

[@bijoy6295]

Thanks a lot of you sir....your classes are very helpful for me.... this is my request to you sir please continue the classes on reasoning also

[@lakshmipalahniuk4627]

Thankyou sir this useful for my exam . Thankyou sir

[@pemmareddysanthi1202]

Wow ...excellent explanation ..sir

[@play_short]

12, 3, 9 = 108 LCM As 3 is a prime number

[@erapaghaprudhvi4132]

U'r amazing lecture sir keep going like this....... 🤩🤩👏👏

[@FeelFreetoLearn]

Thank you madam, I’m glad you liked my method.

[@pavithrasai6103]

Great teaching sir.. thanks a lot sir

[@preethiqueen9701]

Thank you Soo much sir ..I am a per final yr Stu it will helps me more 🙏🙏🙏

[@FeelFreetoLearn]

You’re most welcome madam, I’m glad you found it useful.

[@rakshithkumar8887]

U made it look easy thanks a lot ... ❤

[@MaheshBabuPenneru]

In the shorcuts 12 ,3 , 9.... 3 is also a Prime Number know why you did not follwed the same steps which you followed for 3,11,12...?

[@sivakrishna2159]

Plz answer this

[@itzz__me__vassu]

Keep going sir... Your explanation is very good... This topic is clear 👍👐

[@FeelFreetoLearn]

I am obliged to your kindness. Thank you madam.

[@vibesx_sw]

Most helpful person ❣️

[@praneethverma]

sir i am preparing for rastriya militry schhol these lesson are very helpful to mee

[@FeelFreetoLearn]

I’m glad you found it useful sir.

[@neethuneethu4239]

How to calculate if there are two or more prime numbers in the given question ??

[@bhupendrasinghbora7556]

What about 3 in shortcut method 3 is also a prime number????

[@karunakar2249]

S what about it

[@satishdarla5048]

Lcm means ( least common multiple ) ...... it means we have to take least number which is multiple for all so ....by your doubt we can also write 3× 27=>81 ......but it takes time to calculation... instead of having 27 as least common multiple we no need to take 81 ........ Whether if u take 81 also you will get same answer but it consumes more time. When you have big prime number then it is difficult to calculate so in that case we can go for prime number multiplication.

[@nmdv3159]

S 3 is prime

[@jovi3322]

I don't have any words to express Tq sir and May God bless you sir👍🙏🙏🙏

[@hariharish6297]

Thank you for showing different methods of finding LCM, kindly please make another video for how to find HCF sir by using various methods...

[@pandipotuganesh5342]

How to calculate lcm when we get two OR more prime numbers in a single question at a time?

[@SMRTELUGUEDUCATION]

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[@vinaykumarsa7713]

Sir you are really doing a excellent job, crystal clear of all topics lots of ❤️ from Karnataka.

[@FeelFreetoLearn]

I am obliged to your gratitude and kindness. Thank you sir.

[@koraapolunagaraju3790]

Thank you very much sir for teaching us.

[@kunalvirk]

I think for 18:56, prime numbers other than 2 and 3 will go further for shortcut method.

[@karuppusamy2503]

👌Thank you so much sir very helpful for your method🙏

[@FeelFreetoLearn]

You’re welcome sir, I’m glad I could help.

[@MJ.ftstudies]

Bro 3 is also prime😢😢😢 20:45

[@priyajunnu2971]

Sir pls continue dis basics for all the topics bcz somany ppl dntknw the basics its very useful to us somny ppl not affort to go to coaching classes in dis covid pandemic ty

[@FeelFreetoLearn]

I surely will madam.

[@VENOM-uc9we]

Thanks for ENGLISH❤🎉

[@rakeshkumarparida98]

18:49 sir but 3 is a prime number

[@madhavi6117]

Thank u sir its really very helpful to me

[@FeelFreetoLearn]

I’m glad you found my videos helpful sir.

[@sureshmanne9083]

Way of teaching very nice sir..

[@FeelFreetoLearn]

Thank you sir.

[@BaluPudi-e1d]

is all you are and hcf classes are useful for the competative exams like rrb ntpc and so on.. or any other extra stuff required to prepare sir.

[@aryarohanrachamalla2730]

Sir in 3rd example 3 is prime number so we have to take 3 outside then LCM for 12 and 9 is 36 then do we have to multiply with 36 with 3???

[@study_to_seek]

God bless you sir 👍🙏

[@pemmareddysanthi1202]

Ur videos are useful to students and also teachers sir ..iam a teacher ...tnq sir

[@currentaffairs590]

After long tym

[@shraddhakhedkar6269]

Thank you so much sir!😊.....please bring such more playlist series of all remaining topics...this is really very helpful for us.

[@FeelFreetoLearn]

I surely will madam, I’m glad you find it useful.

[@sairamana4255]

Sir, what shall we do in shortcut method.. if 2 or more prime numbers in given problem..

[@saritakumarisingh6763]

Fantastic & superb taught

[@LakkojuHemanth]

sir in the above example 3 is prime no please check it 19 11 time stamp please check