HCF LCM 1 || Number Systems || Quantitative Aptitude || CAT Preparation 2024
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- Опубликовано: 28 июл 2024
- Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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You deserve a lot more views!
This is the best channel on RUclips for cat prep, others all are no way near compared to yours 🙏
Superb,,expressed this topic in this much lucid language,,,thanx a bunch hon'ble Ravi sir,,love from patna
If teaching is an art, u are an ultra legend master artist.
I think I am not going to forget this topic now. Thank you very much Sir
The concept was explained very clearly. Thank You Sir
The best teacher ever and the best channel for cat preparation..
Just getting addicted to your way of teaching!! Thankyou so much sir🙏🙏.
This is such a great channel I'm glad i found it ❤️
I have a little doubt pls tell me that in 1st qsn sir ne kse bola ki ye coprime no. Hai there sum is 324 vale question me
@@heygauravtaneja wo sir ne sec method btaya h is ques. M hcf already dia hua h or sec method k according hcf humara common tb aega jb ek no co prime ho or doosra no common . To yhii h yhaa ek no dia h or sum dia h to sec no co prime hona chaie.
@@aditisrivastavaas3177 Thankyou so much Mam
Me too
Sir ke full videos quant ke kha par milenge?
17:56 - We can do this with euler concept- 6 is the Euler number of 18. As the question doest define the numbers, We can take half the Euler number , So we get 3.
bro the last part is difference or perfect square na???
can u tell me which us the last part of the number system
Good teaching! For English learning, I like Vidya Guru videos very much. Her all content remained so useful for my many several competitive exams.
Audio isn't even that bad people are saying it is. Loved the lecture. Thank you, sir! ❤️
17:57 the question was asked in CMAT
Ravi sir teach us a very very brilliant concepts and I m really thankful to it .....but along with this I want to mention that these concepts are given in Arun Sharma book not even these there are other good concepts also there .....so I highly recommend u to buy this book of Ravi Sharma those who prepare self.
Sir, what if it is sum of 3 or more numbers?? what will be the modification in Euler number?
audio is pathetic in almost every lecture. Still, the lectures are 10/10
listen on mute
@@prakharkumar4653 😂😂😂😂
@@prakharkumar4653 it means u listen on mute ? bhai cartoon nhi dikha rha sir jo mute krke dekh rha hai
@@sagardubey3800 aww kid sarcasm word suna hai ?
@@prakharkumar4653 han suna na ek bacche se prakash kumar se ! kya bhai khud hi bolta hai aur khud ko hi nhi pata .....Ghajini
hai kya tu??
Thanku so much sir for all the videos😊
Thanku sir for providing video
If the audio was clear and audiable , it would have been more helpful but the contents are good
sir in many videos audio is not clear, please check sir. THANKYOU SIR FOR PROVIDING SUCH USEFUL VIDEOS.
yes please look unto this
For anyone wondering, the Euler number mentioned is the Euler totient function.
Sir in the last question how can we say that all the pairs should contain only Prime numbers because to be coprime the condition is different I mean they should not have common factor rather than being prime
Hello sir , in question where hcf is 18 and sum 384 of 2 numbers .When we apply logic of difference of such numbers=18x ,i.e multiples of 18 and sum of such numbers is 384 , we get 18 possible solutions . why this logic doesnt work here ?
Hello sir, it is not necessary that all the coprime nos. found through Euler no. are coprime with each other, is it?
Thank you so much sir.❤❤
Completed number systems finally
Sir just wanna know
AApne sir unit digit of number cover kiya h sir?? Apne unit digit of factorial cover kiya h but normal number like 7^402 what would be the unit digit aise wale questions sir
Thank you
Thank you, sir.
Great sir thanks
Thank you soooooooooo much sir❤
Thank you Sir 🙏
Thank you sir
I guess orderedness or unorderedness doesn't matter since b has to be greater than a right? I mean for 18 (1,17), (5,13), (7,11) are the pairs possible. But in the case of (17,1), (13,5), (11,7); b becomes smaller than a.
Same doubt
Sir, there I couldn't find factors 13. Can anyone help me find it.
Love from Uttar Pradesh
Thankyou sir
Sir 3 and 16 are also co-prime through Euler concept I got the answer as 4 ! Please help
How he find euler no.?
sir the audio is not clear in many videos
Sound problem 😑
why we considered only co prime number during calculation of hcf and lcf? please answer.
Bcos you are finding highest common factor. If the number isn't co-prime there is something in common btw them and you can multiply that common factor to your presumed hcf to get actual hcf.
Thanks sir☺️☺️☺️😃😃
Can someone tell me in which video has he previously explained the Eular's Approach?
Remainders
@@Rodha thank you sir
HCF OF A,B = any factor of B-A , but how?
Sir in question 1 ,you have mentioned 1 and 17 as possible number to get sum as 18 but 1 is not a prime number. .
co prime means that both the numbers should not have any common factor other than 1, or in other words, their hcf should be 1. It doesnt mean that the number should be a prime number. for example 4 and 5 are co prime to each other, or 9 and 25 are co prime to each other. Hope this helps!
Thanku so much sir.. Respect 🔥🔥
Hey are you preparing for CAT'21?
@@sjsthomasnick3002 no ,am preparing for CMAT 21
@@omamabinsami4436 all the best bro. What other sources are you referring to?
Firstly, I wish to be Thankful for Honarable Sir.! I'm glad to subscribe this Channel Forever. 😍😊 I have one doubt sir, please help me to overcome this- In Euler no'r determination, During Elimination of prime no's which primes no's to be taken, example- E210=210[1/2][2/3][4/5][6/7], why should eliminate this only why not further, SIR. other than sir, anyone can ans me. Thank You sir.
cz these prime no.are factors of 210 ..
Is co prime concept applicable in 3 or more numbers?
yes , with the case of 3 or more number we check that each and every pair must be co prime with each other
Everything is wonderful except audio quality
In the last question how do i know that all the 24 pairs are co-prime with each other...since we dont know all the factors?
By definition Euler number of a number N is no. of numbers before N that are co- prime to N.
Thanks alot 🪂
Sir (3,5) are aslo co prime
some issue with sound. otherwise content is great
The sound quality is very bad
Can anyone explain how euler number of 210 is find ?and how 2,3,5,7 sir had taken
Prime factors of 210 are 2,3,5,7
Audio is not clear, kindly check
No of coprimes =0.5 times Euler number
At 24:04 Eulers formulae output is wrong it should be 45 instead of 48 . Sir please check it .
It’s correct
I covered the above concepts sir but I am not able to solve mocks because they are asking in other concepts.Is these videos enough for number system or any remained sir.
So hello priyayatham sai were u able to solve mocks by seeing these videos??
Sir in the first question why you have not taken 8+9 =17.as two consecutive natural numbers are co-prime.
The total of the those nos. should be equal to 18. Watch it once again.
Bhai nashe me hai kya 😂😂😂😂
@@ayushbhargava1062 bhai vo eulers no me 7 tak q gaye h?
Sir you teach very well here in English but in unacademy English, hindi mix and casual
Can anyone explain me how he solved so quickly in 23:40, 48 as answer.
His Calculation skills are beyond human imagination
Yaa I also wanna knows how 48 comes
Love your class sir 🤟
very bad audio quality but awesome content
voice is not clear, hard to understand
Please anyone tell me what is Euler number?
Euler ke liye factors wala video dekho.... Number system me sbse phle factors aur remainders dekho .... Mostly sb kuch cover ho jayga... Aur wahi sb use hoga baaki chapters me
@@subhamprasad5587 thank you
22:41
11 and 199 ❌
shivam kamat (38)
20-9-2021
thank you sir 🙏
Bro U giving cat this year?
Can I refer the playlist for my gate cs aptitude
I just wasted by 20k by joining a shit institution
Thank you so much sir
sir what are variables and how are they orderd/ unorderd
Explained in Numbers and P n C.
10:00 17:00 25:00
Sir yeh 210 kaiese aya??
7a+7b=1470
Divide both sides by 7,
a+b=210.
How is a+b=18?
did u get an answer?
simply dividing both sides by 18
The AUDIO is soooooo badd....but still we need to manage it .(I hope they bring a newer sereis atleast for the next future batches of high QUAILTY.)
There is an issue in audio
Anyone explain that Euler concept couldn't understand that in Q-2)......,......if the no: is 31 how can we find the no; of ways using this concept?
31 is prime,..so for any prime number...it's Euler is = (no. - 1).
Then E31 = 30
E29= 28 ...E7 =6 . .°. only for prime numbrs
@@priyankakumar7387 and what about composite number... Just like in the question no. 2 , the number is 210.. Can you explain, I didn't get the Euler concept
@@sarinayusuf6525 Euler number is generally those numbers before that particular number .. which have nothing in common
@@sarinayusuf6525 For example 10
In prime terms 10 = 5 × 2 ....
So any number before 10 .. which is not divisible by 5 and 2 is 10s Euler number
Such as 1,3,7,9
Is there any one who has a subscription of unacademy for cat prep. hai toh plz reply
How 6,7 can be co prime?
Because 6 is not a prime number!
Two consecutive numbers are always co-prime
because the HCF of (6,7) is 1 only .. :)
@@sonnet37 no similar factors
because they have nothing in common
Sir don't write directly answer after the formula, just solve it all
Sir audio is not good.We don't understand anything
Sir your audio quality poor....plz improve this
worst audio
Go to another channel then
horrible audio