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.
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
@@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)
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
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
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...
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...
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
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.
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 ❤
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 👍
@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...
sir i have one doubt! IN short cut method ...first we check prime number or not then pick higest number, but here 3) 12,3,9 here 3 is prime number then how you leave it sir
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.
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.
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.
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.
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.
this is a very good video with a very detailed teaching style. but can anyone clarify my doubt in the shortcut method the last 2 questions are having 3 which is a prime number, but why isn't the sir considering 3 as a prime number🤔🤔. this made me question my math knowledge. can someone explain me this🥺🥺
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 , one more in 12 , 3, 9 u took large no directly here 3 is the prime nah??? can u pls clarify my doubt asap..
Sir i kindly request you to make videos related Nimcet exam because nimcet exam preparation kaga oru tamil channel kuda teach pannrathu illa sir ellame Hindi la than sir iruku so please please teach maths and quantitive aptitude for Nimcet exam. It would be really helpful for a lot of students including me sir.
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... 🙏
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.
Hi sir, really your videos are amazing. Very helpful to us. One doubt for me? 3 is a prime number. But in LCM shortcut method, why you did not choose 3 as a prime number?
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.
Sir i have one doubt Find LCM 10,20,30,40 Step 1 check prime no Step 2 check highest no is 40 Step 3 40 should be multiply remaining no's Step 4 40x2 = 80 this is also not multiplying remaining no Please tell me sir
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.
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.
Thanks for this.
thank you so much...
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
@@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)
Thank you
Sir, at 18:56, you mentioned that there are no prime numbers. However, 3 is prime.
same ques
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
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
😊@@shivanithish6061
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
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...
I am obliged to your gratitude and kindness. Thank you sir.
@@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
@@FeelFreetoLearn❤❤❤
@@FeelFreetoLearn apply prime no.method in question 3...same question is asked by many students why u are not responding to it
....
Naa louda am kadhu first 3 is prime number kadhu anti 3,4 answer malli chepu@@FeelFreetoLearn
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...
Sir in 3rd and 4th question '3' is also a prime number
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
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.
Yes..u r correct.. nobody observe this.
Max 90% only apply shortcut method
12,3,9 is an example of remaining 10%
Apply long division method
But 3 IS a prime number.
3*12=36
@@PRASHANTKUMAR-su9bx Could u explain clearly?
3 is a prime number, but 12 can divisible by 3
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 ❤
Hope u guys are understand ❤❤
question 3 in short cut method 3 is prime number right? Confused can u clarify sir
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
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 👍
Your kind words and remarks are my inspiration, thank you madam.
Sir the lecture was comprehensive really but I got so confused in 3 as 3 is the prime no
Yes same confusion 3 is prime no
@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...
Sir I am in 7 class
same doubt i have,plz any one
Yes exactly
I never had best teaching in my life TQ sir which is your dedication and spreading by quality of knowledge...
sir i have one doubt!
IN short cut method ...first we check prime number or not
then pick higest number, but here 3) 12,3,9 here 3 is prime number then how you leave it sir
Sir,3rd question there is also prime number i.e 3 hence 3 multiply 12 equals to 36
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???
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.
Yes , absolutely right
Yes ur corect
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.
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.
U r correct ...but sir not giving explanation for the questions...
I think this is the best class for LCM in TH-cam
I’m glad you think that way, thank you sir.
I am from Nepal and I am preparing for lok sewa and your videos are really very helpful sir. Thank u soo much🙏🙏🙏
You’re welcome madam.
Your way of teaching is very good...meri daughter ko ekdam samajh aa gaya concept of LCM ...she is in 5th standard...
Thanks
Very useful...really appreciate your way of teaching
Koi Baat nahi hai ji, mujhe kush hai ki aapne isse upyogi paaya.
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.
sir please explain why 3 is not a prime number in your example Time - 20:26 and 18:52
I finally found the Indian guy on TH-cam
How to calculate if there are two or more prime numbers in the given question ??
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...?
Plz answer this
I just wanna say thank you for your explanation on LCM because this really helped me when I did not understand it
Sir in the 3rd and 4th questions why don't you consider 3 as a prime no. ???
Sir in shortcut method all numder prime means what we should do
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.
12, 3, 9 = 108 LCM As 3 is a prime number
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.
3 is also prime number ryt?
Sir, what shall we do in shortcut method.. if 2 or more prime numbers in given problem..
Sir, 3 is a prime no.
In short cut method,one problem there is no prime no but..3 is there which is prime..but your answer was right
Sir Which tab your using for writing please give reply please sir
NUMBER 3 IS A PRIME NUMBER WYM?
In shortcut method question number 3 contains 3 and it is prime number
Best teacher ... explain basic method from zero level ... thank you sir ...you teach very superb 👌👌
Thank you very much for your valuable feedback sir.
@@FeelFreetoLearn sir i like the way you solve every question from basic method ... i m your follower from 3 years.
th-cam.com/video/BRudV1A8Q0s/w-d-xo.html
if we have more than 2 prime numbers what we have to do..sir!
Sir in shortcut method last but one problem thre is a prime number .I think so 3 is a prime but you said there is no prine number ?
this is a very good video with a very detailed teaching style. but can anyone clarify my doubt in the shortcut method the last 2 questions are having 3 which is a prime number, but why isn't the sir considering 3 as a prime number🤔🤔. this made me question my math knowledge. can someone explain me this🥺🥺
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 , one more in 12 , 3, 9 u took large no directly here 3 is the prime nah??? can u pls clarify my doubt asap..
Thnku sir
To b honest ,,i had a mathematics phobia,but watching ua videos makes me the phillic towards it
I’m 5th grade but I still understood whatever he said! You are a good teacher
Sir in long driven method 3,5,9 we have to take 2 or 3
sir in shot cut method 3 example : 3 is a prime number
I also have the same doubt...
Sir, will u explain in the 3rd example 3 is also a prime number 🤔
Sir, could you explain ?
Sir can you explain 3rd example it has 3 prime number
sir but 3 is a prime number, isnt it? you ignored that in ques 3&4
sir in shortcut trick 3rd example 3 is a prime number know sir ?
Sir this video is ausump I was confused with this L.C.M Topic you only cleared thank you very much
Sir i kindly request you to make videos related Nimcet exam because nimcet exam preparation kaga oru tamil channel kuda teach pannrathu illa sir ellame Hindi la than sir iruku so please please teach maths and quantitive aptitude for Nimcet exam. It would be really helpful for a lot of students including me sir.
I think for 18:56, prime numbers other than 2 and 3 will go further for shortcut method.
Why don't we included in shortcut method 3 as a prime no. we know.
But why in problem it is not included sir 🙏🙏
in shortcut method 3 is prime no
what should we do for such
in short cut , in question 3- 12,3,9(LCM) here 3 is also prime number know?
Sir I have a doubt in 3rd and 4th question 3 is also a prime number right if we apply shortcut method lcm will wrong
Thank you for showing different methods of finding LCM, kindly please make another video for how to find HCF sir by using various methods...
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... 🙏
sir in the above example 3 is prime no please check it 19 11 time stamp please check
Sir please do more video sir I'm preparing upsc exam sir .. I'm very weak in csat sir I'll following ur video only sir thank you sir
Thank you so much sir!😊.....please bring such more playlist series of all remaining topics...this is really very helpful for us.
I surely will madam, I’m glad you find it useful.
How to calculate lcm when we get two OR more prime numbers in a single question at a time?
th-cam.com/video/BRudV1A8Q0s/w-d-xo.html
What about 3 in shortcut method 3 is also a prime number????
S what about it
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.
S 3 is prime
Kaash sir aap pehle mile hote ....toh main Bsc main fail Naa hota ....maths favourite bn rha h mera apko videos dekhke .
Wonder teacher🙏
Sir 3 is also a prime no... Then why you did not consider that like 11
Sir in short cut method question no 3&4 3 is a prime number
Hi sir, really your videos are amazing. Very helpful to us. One doubt for me? 3 is a prime number. But in LCM shortcut method, why you did not choose 3 as a prime number?
Sir Your are the best Solution for beginners and learners 🙏🙏..
I’m grateful for your kind remarks, Thank you sir.
sir, but in short-divison -> 3) 12,3,9 . here 3 is also a prime number know sir, how can we solve?
Sir you are a god to me,plz providing more videos for non maths students
Thank you sir.sir your teaching is so amazing . I loved you teaching.
I third question 3 is a prime num.
And in 4 th question 3,11 both are prime numbers sir.
Pls consider for UPSC too sir
Bro can't we take 3 as prime number??
Wow sir you are teaching very well 👏 thank you sir thank you very much sir 🙏 😊
Wonderful method sir ... I appreciate your method and you ❤
sir,3 is also a prime number right?
Thank you Soo much sir ..I am a per final yr Stu it will helps me more 🙏🙏🙏
You’re most welcome madam, I’m glad you found it useful.
Sir , 3 is also the prime number why don't u take 3 in to consideration, if it is also the prime number. May u plz explain it will be thankful to uh.
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.
Thanks for ENGLISH❤🎉
Sir i give u 100 out of 100....your videos to the point... I have no words to explain.....
Your kind feedback is my inspiration sir.
Simply super...chala clear ga explain chesaru sir 👌👌👍👍
Thank you for the kindest remarks sir.
really awesome this section sir. it was very good for me
Sir,in the shortcut method 3rd questions 3 is prime number right
3 is a prime number.
Why did you took 12 first if 3 should be taken 1st as 3 is a prime number 12,3,9
Sir what is the shortcut rule for 12,15,18
sir 3 also a prime number but why your ignoring in example of 12,3,9 and 3,11,12....?
I love your videos very much
you are teaching great
a billion thanks to you sir
Your kind words and remarks are my inspiration, thank you sir.
In shortcut method 12,3,9 3 is an prime number?
Sir why didn't you consider 3 as prime number please answer?
sir i am preparing for rastriya militry schhol these lesson are very helpful to mee
I’m glad you found it useful sir.
Sir i have one doubt
Find LCM 10,20,30,40
Step 1 check prime no
Step 2 check highest no is 40
Step 3 40 should be multiply remaining no's
Step 4 40x2 = 80 this is also not multiplying remaining no
Please tell me sir
Multiply with next number i.e
40x3=120
which is divisible by all 10,20 ,30 and 40 and 120 is the lcm
@@sathwikpbhat9246 50,60,70,80,???pls by this model ☝️☝️80 is biggest right? Then after....?
Last question had 2 prime numbers so what is the solution for this ? 11*3*12 is way higher than 132
I am confused in example3 , even tho 3 is prime number why didn’t you consider it????
Thank you so much sir...ur teaching is just mind-blowing🔥🙏
Thank you madam, those are some really kind words you could spare.
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
Sir have doubt
3 is prime number confused here
Xlent xplaination sir😍
Thnq very much 🙏
You’re welcome sir.
why 3 not considered as prime here?
Respected Sir in 12,3,9.3 is a prime number but u said there is no prime number . Please clarify this sir! 🙏
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.
Sir in comments section so many people are asked about why your not consider 3 as a prime number can you please clarify the doubt?
thankyou sir plz upload all videos on LCM AND HCF