Numbers 3 || Number Systems || CAT Preparation 2024 || Quantitative Aptitude
HTML-код
- Опубликовано: 6 фев 2019
- Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
Join RODHA : www.rodha.co.in/
Follow RODHA : rodhaplanet...
#rodhafullcourse #catexamfullcourse #learnfromscratch #cat2024 #catexamsquantfullcourseonyoutube #99percentile #quant #lrdi #mocks
Welcome to our dedicated RUclips channel, your go-to destination for a comprehensive CAT course, all available for free! With an extensive library boasting over 350 videos and more than 150 hours of content, we provide unparalleled resources for CAT exam preparation. Why delay? Dive into our channel now and kickstart your preparation journey at zero cost. Don't miss out on this invaluable opportunity!
My Facebook Group Link:
/ 570194513099989
Feedback Post link:
/ 323057846372
Discover the transformative world of Rodha Educational Solutions, where we empower ambitious students to excel in their academic endeavors. Join our thriving community on RUclips and unlock the #RodhaFullCourse, featuring top-tier CAT video lectures of unparalleled quality.
Subscribe now to stay updated with the latest releases and invaluable insights tailored to elevate your CAT exam preparation to new heights.
At Rodha, our mission is simple: to provide dynamic training programs that equip students with the tools they need to succeed. Through our RUclips channel, we deliver the highest caliber content meticulously crafted for entrance exam excellence.
Experience the difference with Rodha Educational Solutions and embark on a journey towards academic greatness. Subscribe today.
Rodha RUclips Channel:
/ @rodha
CAT 2024 || Verbal Preparation
/ @rodha
CAT 2024 || Quantitative Aptitude Preparation
/ @rodha
CAT 2024 | Logic Reasoning and Data Interpretation
/ @rodha
CAT PREPARATION 2024
How to Prepare for Quantitative Aptitude
best cat prep strategy, best RUclips channel for cat preparation, cat 2024, cat 2024 preparation best free content, cat 2024 preparations, cat 2024 strategy, cat preparation 2024, cat preparation 2024, cat preparation strategy 2024, how to start cat preparation for 2024, 100 PERCENTILE CAT 2024, ARITHMETIC ADVANCE LEVEL QUESTIONS, BEST FREE CONTENT FOR CAT 2024, HOW TO PREPARE FOR QUANT CAT 2023, BASIC TO ADVANCE CAT 2024
This is awesome sir . Helping so many poor students who cant afford coaching. Hats off to you sir
Can u tell the subtopic arrangement of watching number system.. Bcoz i think its mixed up
@@experimentointerneto902 it's not it's in order
Bhai hum toh coaching bhi jate h but vha inka 10% bhi ni pdhate .... time center m
@@Someone7676 sahi kahe bhai
What was your cat score
You just proved that legend do exist!.....BEST CHANNEL I'VE EVER COME ACROSS!....(kudos)
Thank you for this. You are providing help to so many non maths aspirants who even with coaching are unable to cope up. This is the best thing on the internet for me.
It’s really great to have u helping us in this way.arguably the best content I have ever had in RUclips for helping the aspirants for free.
Maine bhot sare classes kiye h no. System k...no.systm k nam sun k hi bore ho jati thi bt...apke jaisa kisi ne ni pdhya ...u r jst amezing sir... thanks to maa Durga jo apka channel mila❤️..lots of respect frm bihar😊
a^2 - b^2 = (a-b) (a+b)
Sir. HOW ARE YOU SO AMAZING!!! Thank you for this
1007 is not a prime number but 1007^2-1 is perfectly divisible by 24 and 1007 numeric digit sum is 8 i.e. not 3, 6 or 9, so we cannot find if a number is prime or not by these two methods. am I right???
The digital sum of 973 is 9+7+3=19
19= 1+9=10
10=1+0=1
but '1' is neither prime nor composite.
Does that mean the digital sum method cannot be applied on this question?
Op 😂😂
it can be applied the digital sum of 973 is 1 which means it cannot be determined with the digital sum if it is prime or composite. Note, that the digital sum is like a negative test it guarantees that the number is not prime if the DS is 3,6,9 but when we get any other answer the primality of that number is undetermined.
Sir , thankyou so much for everything you have done students like us who can't afford coaching are blessed to have you.
In video at 17:35 I have query is 101 is prime number right...but sir telling 101 can't be prime number how? Can you tel me plz rhutvi
@@tusharrj6578No Tushar sir is not saying that 101 is not a prime number. He is saying that if we multiply 101 with the other factor it can't be prime anymore because then we will have 3 factors of 1000001 that are 1, 101, and 1000001. Therefore, 1000001 is a composite number.
a square + b square =
ab+ab+1
But this only applies.for square and not for every even exponent.
Sir, very nice. Theory explained @ video time 10 minutes in this video,:
Can it be used to find factors of a composite number? I.e. to know if we have found all the factors and furthermore finding is not required?
Thank you so much sir for this awesome session❤️
Sir this is immense help I'm really grateful for this, as maths was something I was really afraid of I'm currently in class 11th , I don't have maths but I'm confident your lectures will lead me to the IIMs .
Thank you!!
Amazing video. This has to be arguably the best online content. The concepts taught and even the level of questions are terrific. Kudos sir !
Thank you
Bro did u wrote cat exam
@@jibinjoby9523 yes I did
@@zoro3188 Coaching ya self study bro??
What was your cat score?????
1000001 how it can be 10 to the power of 6 ? 10 to the power of 5 only gave100000 pls clarify my doubt ! .
10*10*10*10*10*10 = 1000000. You should aware of the zeros. 10 lakh has 6 zeros on it. 1 core has 7 zeros on it. Check for power table you will understand.
1000001 = 10^6 + 1^6
n is even. Hence, we can't conclude anything.
But if we write it as (10^2)^3+(1)^3. This tells us that it is not a prime number. How will we know which power to consider?
Thankyou so much for these videos .
I ' m a IIM aspirant who is not able to affort coaching classes.
Your classes are really helpful for students like me.
Where can we get the practice questions for these sessions?
Sir, the question is 3^193+5. If we replace the no. 3 with 4 then how to determine the ans is prime or composite. Bcoz even + odd is odd.
Sir aapne (10²)³+1 mai cube 3 cut kia hai kya you factorise it in (10²+1). Plz tell
Sir @4 minutes of video time, will it be easier to start with the smallest prime number? I mean any reason why you are starting from the largest prime number?
Sir as you said digital sum of prime number be 3,6 or 9 with example 949876=9+4+9+8+7+6=43=4+3=7
Here this is not a prime no then how digital sum will give prime no.? Plz explain
From where we can practice the questions sir? Which biok will be better for CAT
Which section should we look after this ?? Factors 1??
Sir all you ask is about small numbers like 36,54,68.. But what if they ask for larger numbers like 2379,3798,5577.plz reply sir
Sir...where can I get quizzes you were talking about the past years papers that you'll discuss?
sir is on unacademy now
i didnt get the logic for square root for finding its prime no. or not at time 7:51
Any one up there who got the logic ???????????????????????????????????????
Your are doing a great job👍
24:37 it is not always divisible , it is divisible by a+b only if n is odd...take a = 2 n = 2 b = 1, 5 is not divisible by 3
You say digit sum can never be 3 , 6 or 9. But in 973=9+7+3=19=1+9=10=1+0=1 so it's a prime no but it's not please explain sir
Sir which book should we refer for daily practice
Square root method may be time taking for 3 digits or more numbers. Is there anything else method
Where can i practise question from this topic sir please reply 🙏🙏🙏🙏
if for a^odd - b^odd is 1 then it is prime or composite
Thank you sir, This series of videos is very helpful to me, easy to understand and probably the best online content
Amazing online content till date.You are just amazing.keep going sir.
hope you would have completed writing your cat . can i know how much did his videos help you
@@harshithaksubramanyam6135 pta lge toh meko bhi btana
@@abhinavsharma341mujhe bhi bta do
Is there any video where this topic is continued
great videos very easily explained
Sir, Pdf notes are available of these videos.
At 10:40 .....A number that is not divisible by 2
Can never be divisible by 6 ??
How is it true??
Sir ratvao Mt p and C ki trah ni h ye video Jada questions nhi h bs concept hai pta ni lagra kaise apply honge different type of question mai
Sir, why a^2 + b^2 cannot be factorised?
By degital sum prime ni sum can never be 3,6,9 but 7498 sum is 28-10-1 (it is prime) but no 7498 is a prime no ????
i have a doubt in the last part like any number of the form a^n +b^n is divisible by (a+b) you said for example take 2^6 + 1^6 = 65 which is not divisble by 3 (i.e.a+b) why this happens then how can we apply this for all other questions of similar pattern
a^n+b^n is divisible by (a+b) only when 'n' is odd. When 'n' is even then it's can't be factorised.
In your case 'n' is even (i.e., 6) , so its can't be factorised.
as seen from the last example 973 is a composite number but it is satisfying the first 2 conditions at 11:15. I have a doubt here. Sir, can you please clarify this... Thank You
you need to check with all the 4 conditions.
if all 4 conditions satisfy then its a prime number
And thank you so much sir...🙏
You really taught well
Sir can you again explain divisibility part
18:04
Sir you have written a^2 - b^2 = (a-b)(a-b)
Sir it should be (a+b) (a-b)
bas ye hi comment dhoondh rahi thi
Thankyou so much sir 🙇
I couldn't afford it for much price
How come psquare minus 1 is div by 24, sir plz explain
You're doing god's work
in the question of 1000001 a prime or not it can be represented as 6k-1 then why it is not prime
Please explain the last question
This All Vedioes will help in GATE SSC BANK EXAM ?
Better than unacademy ✌✌✌✌✌✌
Thank you so much sir!!
You are the best sir 💪
very helpful , thank you
Great explanation👍
Can anyone share a link of fundamental principles of counting in this comment pls
Like this where can i get DILR and VARC
Thank you so much sir.❤❤
10:31 but why are we only checking divisibility of only prime factors....
How would you explain 1000001 is not a prime number. Please make me understand again sir
Perfect session.....
Give a medal to this man
why does this channel not have 1mil subs??
Can someone explain me the P^2-1 / 24 method , also the first two ones. I did not get those. because 973^2 -1 is divisible by 24 but its not a prime number.
the reverse are not always true . like all prime numbers should be of the form 6k+/-1 , but all numbers having the form 6k+/-1 is not prime .
Thank you Sir 🙏
but 973=6*162+1 so shouldn't it be prime
Thank you Sir
Can prime number be 3*2*k ± 1 = 3k ± 1 ??
Sir Last wale question mein jo number hai wo prime they ya composite aapne bataya nahi? Pls tell
Thank you so much
1:00
Given P ≠ 2 or 3
brilliant sir
thankyou sir......
If A^n +B^n is divisible by A+B then what does it mean prime or not?
It means its not prime..
Because uss number ka ek aur factor aa gya h and kisi bhi number ke 2 se jyada factor hote hein toh voh prime nhi composite number hota h
Sir, the number 973 should be a prime number by the p2-1 divisibility by 24 rule, as 973 square minus one is completely divisible by 24. Kindly clear the doubt sir
reverse is not true.
in @16:48 why don't take digital sum?
Sir lcm aur hcf ke questions ni btae apne
Guys stick with the prime method where we find the square root of the number closest to the given number to find whether the number is prime or not. It's the most reliable method but lenthy.
am really bad at this can you let me know once we find its always divisible by 7 how does that answer whether it is prime or composite
if a no. is always divisible by 7 then it is a composite no. because it has more than 2 factors. for example take 14,we know that 14 is divisible by 7 and also 2 so it is a composite no. because it has more than 3 factors that are 1,2,7 and 14 itself.
a prime no. has only 2 factors that is 1 and the prime no. itself For ex 7
7 is only divisible by 1 and 7
Can you sir explain me in the last one sum in the video why you wrote always divisible by 7??? From where the 7 was come pls if anyone know
If you solve √973 then you get 31. Something and you can check (p
Part 4 is missing sir
Sir i have a doubt,
1) On that question of 973 is prime or composte, can't we use that formula of digital sum can never be 3,6 or 9
So 9+7+3 = 19, 1+9 = 10 , 1+0 = so 1, so therefore it is a prime number, but in the same way as you explained it is also divisible by 7 ...
Please show me where I am wrong?
If digital sum of any no. is 3, 6, or 9, then the number is definitely not prime, however, the its converse is not true that is if the digital sum of any no. is not 3,6, or 9, then the no. not necessarily be prime
I forgot the number system and will have to revise again 😅 Thanks btw
Sir i am prepairing cat2023 this syllabus is ok
3 is a prime number and the digital sum will be 3 is this not the case
To check a prime number through digital sum, the condition is whether the sum shouldn't be 3, 6 or 9 or whether it shouldn't be divisible by 3,6 or 9?
The sum is notequal to3 , 6 and 9 bcos in digital sum we check for the sum of digital sum so logically it also it is concludable
Sir after the number system (3) , which part should I continue factorials or factor?
Factor I suppose is it true? Are you done with it
If yes may you please guide me with it.
All the best for your prep!!
a square minus b square is not quite
right at 18:35.
Thankyou so much
Sir for any 1^n+2^n......+n whether n is even or add formula is given but in case 5^40+6^55+8^28....how to calculate ans
That is if n will vary either even or odd
you can break the numbers and powers to simply to a simpler number like 6=2*3 , 8=2*2*2
24:43 but sir if here we take 2's power as 2 so ans will be 5 n it is not divisible by 3.
2 is a even power....
According to digital sum 25 ( 2+5 =7) is a prime number because digital sum can never be 3, 6 or 9 . how????????????🤕
Sir, u said 1000001 ,is NOT a prime number....BUT, if we apply the DIGITAL SUM method, its sum is not equal to 3,6 or 9...then it is a PRIME NUMBER right...??
the statement was
"Digital Sum of a prime number can never be 3,6 or 9"
Nowhere its mentioned that
numbers whose digital sum is not 3,6, or 9 is a prime number.
ie reverse is not true
sir kuch samaj nahi aya composite numbers ke😮💨😥
shivam kamat (3)
30-7-2021
thank you sir🙏
Sir at 14:50 you said wrong that number is prime you solved it but I think you uttered it as composite rather prime
the no. is composite becoz 2 is the only even prime
and the no. in the ques was even and not 2 hence that was not prime
THANKS😀
Sir why you did power of 1 to 3007