Numbers 2 || Number Systems || CAT Preparation 2024 || Quantitative Aptitude
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- Опубликовано: 6 фев 2019
- Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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After paying huge pile of money for books and fraud coachings, one is left with only disappointment.... But then Ravi sir with his video of Rodha Channel appears and takes away all the tensions of Quant, Lr, Di,etc and leaves us with full knowledge about each concept..... Thank you sir.... I can miss my coaching classes but never dare to forget watching your video even on a single day💝💝
offline coaching at this time? or you're talking about online?
same comment in every video...
Kya is playlist m LR DI ki bhi video h?
Well said
A very big thanks to Ravi sir
A true legend
Mai to Mba ki tayyari kar raha tha ab aisa lag raha hai CAT nikal jaye ga .
*Two common doubts:*
1. *Reverse is not true*
It means all prime numbers will be of the form 6k+-1. But all numbers which are of the form 6k+-1 are not prime numbers. For example, if you take the prime number 13, it is of the form 6k+-1 ie, (6×2)+1 . But if you choose a random value for k, for example k=4, (6×4)+1 = 25 which is not a prime number. So that's what he means by "reverse is not true"
2. *Odd number question*
They are all odd numbers. The equation for odd number is 2k-1. So if we take first term and equate, 2k-1=1, solve, k=1. For the last term, 2k-1=91, solve, k=46
25 is a square of 5 so i think it's an exception
Thanks for solving
@@premmotghare4887 6*8+1=33 which factors are 3 and 11
👼🏻
Pls tell me how to decide K
Need more teachers like you. This is by far the most useful channel for CAT. I have the study material of TIME and I can say topics are covered in depth in these videos. Thanks a lot, Sir.
yes u r right .now i think i have wasted my 55000 in time
@@anchalmehrotra9502 😧ayyo ..sad.. Did you purchase study materials?
@@sudhakarankumar9027 ha time ka mila tha
@@anchalmehrotra9502 hi bro, is this enough for ipmat
Same I was going through my cat books but couldn't understand any examples of those books so I came looking for explanation of these topics and was lucky enough to find this hidden gem.
Aaj se mera bhi favorite word "Right" ban gayi :D
Thank you sir, I am understanding the concepts very lucidly
Well explained !!!
Thank you for your efforts.
His first example is how I did my maths all my life lmao
You are one of the best teacher ❤️
Thank you very much sir 🙏🏻
Thank you sirr🙏we will support u alwayss
Well explained the best cat preparation channel in the world is Rodha. amazing work
ek saal bad mene suru kiya ha sir. thanku so much ❤️
love you i solved a freaking question myself the concept i never got in school i am doing it now for mba you are god
Thank you so much sir for your guidance ☺️
Thank you so much sir u explained beautifully.... Love you sir from Assam
Thanxx sir for free cat coaching
This channel is a holy grail. Thank you so much sir.
great clarity
Great work sir..Keep it up
Amazing expalin in detail
Thank you,sir.
Thanks Sir
You are amazing Sir!
Tq so much sir its really increible teaching happy to listing &learning tqs alot sir u &my sir suggestion me.. 🙏😍guru bramaha 🙏🙏😍
Great Explanation
Thank you so much sir 🙏🙏🙏
Great Content :)
Sir, what is the utility of the 6K+1 rule for prime numbers? Where can it be used effectively?
Thank you sir for u r best videos
No one can explain better than you 🙂
😊😊😊
Great class sir
so so interesting classes.🤩
Heartly thankful to you sir
Sir iam not clear about the line
The reverse is not true in 6k+_1
What does it mean explain me sir
Thanku so much.
Thank you very much Sir🙏🙏🙏
Thank you so much sir.
Doing a great job for students who are financially weak
Great job sir 🙏🙏🙏
very helpful concept building video, can't wait for the upcoming journey with Rodha for achieving cat25 :)
Thank you so much sir.❤❤
Fantastic sir
sir can you please share the video link to calculate squares and cubes that you mentioned during the video.
Get going sir...very useful videos..ever seen..
U got any college
Yess I'm a beginner!!! I really find your videos are very useful to us..Thank youu so much sir❤️✨️
Also me
Hi..
I'm a fresher as well, are these videos enough for CAT?
Hii kya apke sare rodha RUclips lecture ke notes hai kya please send me
@@sn4480Hii kya apke sare rodha RUclips lecture ke notes hai kya please send me
Thanku so much sir ❤️
Thank you Sir 🙏
Thanku so much ❤️ sir ji
Thank you Sir
Can you please provide pdf link of all the lectures
thank you so much
Thank you so much sir😇
amazing sir
Got it...
Sir first of all your lectures are superbly awesome.. I am preparing for ipmat will this video's work ryt...
Awesome class sir
Well explained, eradicated all my wrong concepts. Very well taught.👍
Which book are you following? And suggest me the best book for quant.
@@dawood9516 Preparing for CAT 2020?
@@jainamhemanee1125 I am preparing for 2024, suggest me best book for quant .
@@dawood9516 even I'm preparing for 2023 but i just started to prepare for it and found that books written by arun sharma are good . All the best
@@ruchitharaj1515 have u purchase any course or join any institute for it's preparation ???
Sir your video is osm
thanks sir
Does anyone know where can we clear our doubts of quant? Any app or website or anything?
legend 🙌🙌🙌🙌🙌
Sir I'm starting of my preparation with number system, should I finish all the lecture videos (of number system) to go quizzes or should I carry them on side by side?
Cat 2026 mark it🎯
sir it means 6k+1 not always prime number but prime nnumber always in the foarm of 6k+-1
Exactly
@@aadishjain7454 No , because in 7/6 Ans is 1 (positive 1) but in 5/6 Ans is -1 (when it is divided by 6 ) or 5 ( when it is not divided by as numerator is smaller so)
🧡🧡🧡thank you sir, huge shoutout !!!!!! one more thing, sir where is the square video? as u mentioned at
@8:00
Sir thanks for the free classes. Can you please share the link for the how to do squares video?
How to get squares of number in 2-3 seconds ?? Where i get that video sir
great work sir.
Thank you. If you like the channel please share among the friends who are prepairing for CAT exam
@@Rodha give ans.
@@jaybrahmbhatt5155 for what ??
Tqu sir
Sir please help me with how you do fast calculation?...
Where are the videos sir is taking about basics remainders and other rules in more than 15 videos , i cant find them if anyone cant drop the link i will be thankful
Super.
Best coching
Sir concept ke liye aapki sirf RUclips videos sufficient h na teeno sections ke liye?
Are all these videos enough for CAT preparation??please answer
1001 is not a prime no. But it comes the form of 6×167-1
hello sir plz RUclips Automatic Caption on kar dijiye
@all , how 11 square + 12 square+....+20 square = (1 square + 2 square+....+20 square) - (1 square + 2 square+....+10 square)
Sir why don't you add ppt slides in a folder for downloads. Kudos to you for your great initiative,you way of teaching and content is just amazing.Where all teachers are busy in unacedmy,you are the one who has provided free quality content.
He is also there now
@@rehnumanaqvi7529 give link?
@@GautamSingh-sm4cw ruclips.net/video/3q6lD5BD-W4/видео.html
@@rehnumanaqvi7529where is the link to download please share
@@rehnumanaqvi7529Hii kya apke sare rodha RUclips lecture ke notes hai kya please send me
What is answer and how to solve "The sum of first consecutive 5 odd number is 197 ? How to solve it? what is its answer ?
Sir, is this playlist enough for SSC aptitude ?
Similarly, can I also say that all prime numbers except 2 are odd numbers(2k +/- 1) but reverse is not true? Reference :- Prime Number form - (6k +/- 1).
I got the same question... I got all the concepts clearly except that Prime no. concept.
Can you please share me the video link of factors..?
Summation of even no's after taking 2 as common what will happened I don't understand
Please someone tell me
Before, quant was my weakest section but after watching yr videos i become more confident ✨💪.....only bcz of u sir ....😇😇😇
Tume smj aa rha h???😥
@@mitashabhardwaj7496 yes! Kyu ??
@@mitashabhardwaj7496 muje nhi aa rha hai😒 😞🥺
@@mitashabhardwaj7496hana yaar 😢samaj nahi Raha hai
Sir in question 1+3+5------+ 91? You have taken it in the form of 2k-1 but odd numbers can be in the form of 2k+1 as well. So, can we take k=45 and and square 45. Can you please explain why you have taken it 2k-1 and not 2k+1?
Please sir
If we take 2k+1 then the k for 1 will be 0 so to make the first no counted as 1 we have taken 2k-1
Can you tell how 46 came? I am confused
@@nandinisatdeve13 they are all odd numbers. The equation for odd number is 2k-1. So if we take first term and equate, 2k-1=1, solve, k=1. For the last term, 2k-1=91, solve, k=46
@@adityatrivedi579 Hey can you tell why we can't take k=0
sir, I have a doubt in prime number form... can't able to understand how to find whether it is prime num or not.....
How you calculate K=46 please explain me
Sir ye odd no wale questions mei Ap kaise solve Kiya smjnni aya
Sir your lecture is really very helpful. Can you please suggest the book for Quantitative Aptitude?
R.S. Aggarwal Quantitative Aptitude is the best book..
Hi Friends What is meant by "reverse in not true"
You are the great sir
I respect you soo much for your social service 🙏🙏🙏
May allah bless you ❤️
sir 🙏
❤
how to get quizzes and previous year questions solved by rodha
Can someone tell me what he explained in the last minutes about "reverse is not true"
Please. It just went above my head
Means all prime no.s are in the form of 6k+-1 but all 6k+-1 are not prime no.s
Sir ek query hh apne bola tha odd ke liye 2k+-1 dono use kr skte hh but in ques apne 2k-1 kiya jisme 2k-1 =92 hh hum 2k+1=92 q nhi apply kr skte isme
Thanks you for classes are in English
Voice is not clear but explanation is best
How ro check whether 1009 is prome or not??
Sir where can I find the quizes
Doubt on prime number in a form of 6k+- 1
2 video not understand
As per my understanding, even and odd numbers can be negative, I.e -2, -4, -6 are even numbers and -1,-3, -5 are odd numbers. Could you please share the source which states that even and odd numbers are non-negative?
For this comment I will subscribe you
I do not understand the topic from 4:24 to 11:20 time period plz help me 🙏🙏🙏