Factorials 6 || Number Systems || Quantitative Aptitude || CAT Preparation 2024

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6 жыл бұрын

Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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Пікірлер: 244

@nikhilbhalla1825 5 жыл бұрын

Awesome concept 🙂 but sir, I think uh made a mistake... Highest power of 7 in 145 ! = 22 BTW Thnks a lot for such amazing videos 🙂

@raviprakash6021 5 жыл бұрын

Sorry yaar .. human error :P

@VinodSharma-fx8gh 5 жыл бұрын

Aare sir, Dil jeet lia aap, 1 saal se smaj n aare thi quants ba background se hu, maja sa aane laga h ab :p

@nikhilbhalla1825 5 жыл бұрын

@vinod_sharma bhaii sabhi ka yhii haal h ... mai to non-maths backgrnd se hun mujhe tb bi mza aara h 😛 Sir pdhate hi itna Acha h :)

@anushiarora7576 4 жыл бұрын

yesssss

@BharatSingh-mi9xo 4 жыл бұрын

@@raviprakash6021 sir ji you developed my aptitude, first i was frightened by number system but i this time I paused the video and solved this GEM question in less than 2 minutes. All because of you.

@RAVIKUMAR-lv2qn 3 жыл бұрын

Trust me ,I joined coaching but instead of doing coching concept ,I trusted on him and today I complete approx 160 lecture with notes and he boost up my quant as well as LR knowledge .Thanks to u Sir!

@madhumitharajinikanthan1007 2 жыл бұрын

How was your score in cat?

@bikashpatwa189 Жыл бұрын

kon sa coaching

@imyours777 Жыл бұрын

how was ur Cat prep from unacademy??

@reshmatakalkar1201 Жыл бұрын

@madhumita rajnikanthan, he went on to score 99 percentile

@mrinalb3972 Жыл бұрын

@@reshmatakalkar1201 how do you know

@ayushkanojiya577 4 жыл бұрын

This video is not included in the 193 sets of Quants course on KZfaq ? Lecture 9th is missing Isn't it necessary for CAT?

@quarkismagical 4 жыл бұрын

Wonderfully explained! Thank you so much Sir!

@sahilkushwaha5864 Жыл бұрын

Sir, there is an error in division of 145÷7 that will be 20 and further divided will give 2 Therefore answer will be 22

@vedikaawal8482 3 жыл бұрын

you are the best teacher ever ! i actually hated maths you made it interesting ... thanks a lot

@soahampandey8821 4 жыл бұрын

Till now I have been very satisfied....and more than that I am thankful...!!!

@kishankumargupta275 Жыл бұрын

Gajab sir...I have never heard such concepts any coaching institute 💕💕

@anshikachaudhary8178 Жыл бұрын

Mind blowing concept and and outstanding teaching........thank you so much sir..........❤️

@aniketsurwade9642 Жыл бұрын

Superb Sir....I am your huge fan after watching your videos ......Thank you sir 😍😍😍

@simranmishra3059 2 ай бұрын

Thank you so much Sir for providing students like us with such amazing videos. I am really grateful to you, I was so worried about my concepts being not strong enough but after watching your videos I dont feel helpless anymore and my concepts are getting clear. I am so glad that I came across your channel. God bless you Sir.

@nandinitripathy1999 5 жыл бұрын

Sir aap bohot achchaa padhaate ho...Maine apne sabhi friends ko jo CAT karnaa chaahte hain, ye channel recommend kiyaa haiii.....!!!!!!!!

@Rodha 5 жыл бұрын

Thanks

@heygauravtaneja 3 жыл бұрын

Have you cracked CAT 2019?

@kloayednap1699 2 жыл бұрын

Sir your explanation is amazing 😊

@pallav7593 4 жыл бұрын

I've so much respect for this person.

@kalpeshbadgujar855 4 жыл бұрын

Thousands of rupee content without fees,than you so much

@jithins7085 4 жыл бұрын

Thank you so much Sir, excellent videos

@mehta.shubham96 5 жыл бұрын

bhut mast maza aa gya

@Ananya.RC. Жыл бұрын

Thank you so much for this dedicated service Sir.... I feel very fortunate to find this channel.

@akshayborde9062 4 жыл бұрын

Very nice explanations Sir, thanks a lot. Where can I get some questions to practice on my own?

@adityagoswami8730 3 жыл бұрын

I was watching it with doing some works by side, but the way you said to try these questions made me do it😁😁

@sayandeysarkar3354 3 жыл бұрын

Sir you are the best in the business,that too free to access...

@narkhedejayesh3589 3 жыл бұрын

You are just amazing, that's it!:-)

@ShashankNS-je5pm Жыл бұрын

Thankyou Sir for Everything 💙

@trendingshorts8092 Жыл бұрын

this type of content should be appreciated by everyone thanks sir

@cumulusmusic100 10 ай бұрын

Thank you Sir 🙏,typing this before watching the video 😊,your videos are always the best sir.

@manishpatel-ng2tq 4 жыл бұрын

excelente concept sir

@Sukhhhhhh 2 жыл бұрын

I had joined coaching for cat but their way of explanation was not good and i had so many doubts. But thanks a lot to you sir for sharing such amazing content for free and I am much more confident in soling questions now .To anyone starting their preparation this is the best channel for your prep. Thank you and god bless you sir.😇😇😇

@bikashpatwa189 Жыл бұрын

kon sa coaching join ki ho so that I dont do that mistake. Actually I am also about to take coaching for 2023cat

@Sukhhhhhh Жыл бұрын

@@bikashpatwa189 bullseye join kiya tha. Don't join that

@bikashpatwa189 Жыл бұрын

@@Sukhhhhhh tq and best of luck for Cat

@neeravd6553 Жыл бұрын

@@bikashpatwa189 bhai quant toh ravi prakash sir he lena best hai

@AshishPal-sh2yo 4 жыл бұрын

Sir where will i find the quizzes?

@feeluke7063 15 күн бұрын

Cannot be more grateful sir......🙏 But it's hard to believe that such a huge topic u covered in these videos.

@ektagupta1701 Жыл бұрын

This is really very awesome channel Thanks sir because i am not able to join paid coaching thank you so much sir..... If I will get top college then i will never forget you , because of your videos, your content I decided for preparation of CAT (coz I am not able to taking paid coaching) 🙏❤

@Nidhing 5 ай бұрын

Kaunsa clg mila?

@nitishsou7439 3 жыл бұрын

Great concept sir

@ManuSrivastava_ 2 жыл бұрын

Thank you so much sir.❤❤

@hitandrun319 10 ай бұрын

Sir for the last ques you have taken the value of factorial and for the second last one just the digit ? Wht is the reason for that

@white_demon6265 4 жыл бұрын

Sir u r awesome👏✊👍

@Rohit-lm9mn 5 жыл бұрын

I'm feeling very satisfied i have solved last 2 question. Thank u so much sir 🙏💕

@ShekharSingh-fr3sh 2 жыл бұрын

What percentile u got in ur CAT exam?

@nitinparashar8977 5 жыл бұрын

Kahan se laate ho sir ye questions ?? Super Sir

@mdsalmanraghib4253 3 жыл бұрын

Thank you @ravi_prakash sir🙏

@dishasingh7482 3 жыл бұрын

Thank you, sir.

@ananyabhargava3966 2 жыл бұрын

Thank you so much sir 🙏🙏

@sunnyhotwheelss9883 4 жыл бұрын

Where is the doubt forum!!! You guys are even not Giving any reply.... 🥺

@vijaytejsiyyadri4369 4 жыл бұрын

Sir.. do you watch pro kabadi league.. coz i found sandeep narwal vedio in your play list.

@diyapiparsaniya3811 Жыл бұрын

Sir in last question u have said that number can't be greater than or equal to 5 then u have taken digits from 10 so 10 is greater than 5 so how did u done this please explain sir urgent help needed @rodha

@ishasingh4736 2 ай бұрын

the way this guy gives you confidence>>>>>>>>>. Incredible human being❤

@geethapriyabalamurugan115 4 жыл бұрын

How to find the doubt forum?

@kshitijbalonie4361 4 жыл бұрын

thankyou

@haripriyareddy9749 4 жыл бұрын

Sir where can i get more questions and quizzes for practice....?please respond sir

@amankumar-nz1yq 2 жыл бұрын

Thank you sir..

@sadasivamsubramoniam1305 2 жыл бұрын

Thank you sir

@raghavrohilla8241 3 ай бұрын

Sir aap bhagwaan ho quants ke❤️

@saighodke6591 6 ай бұрын

Thankyou sir

@manthansahu5582 4 жыл бұрын

Solved last 2 questions.... feeling great sir.... thanks for the hard work you had done....😁😁😁😁

@himanshikiduniya 3 жыл бұрын

I'm not able to understand last 2 questions plz help me out

@Randomworldindia 2 жыл бұрын

@@himanshikiduniya what's the problem ?

@user-fi6ec3jv2f 7 ай бұрын

i didnt understand the last question sir has explained about factorial 5 and after that i am unable to undertstand the solution. please help and reply sir as i am stuck on that question.

@avyakaila7056 3 жыл бұрын

Sir In the last question 22 is an exception too

@senabhi887 Жыл бұрын

The audio output is very low.

@anjanadubey686 4 жыл бұрын

I think there was a mistake in the question of highest power of 7 in ABC factorial, in the last step the answer will be 22

@letsstory-onlylisten8300 4 жыл бұрын

Yes i right answer 22

@chiragchaudhari6188 4 жыл бұрын

Can you please explain how 22 is the answer?

@RussianBose 4 жыл бұрын

@@chiragchaudhari6188 7 * 20 = 140 so, 20 , then dividing 20 with 7 we get 2 times, so 20 + 2

@beautiful041 2 жыл бұрын

We cannot divide 145 as 140

@adityaarun8764 5 жыл бұрын

6:09 AS U SAID SIR, JUST FOLLOWING UR LECTURES FOR MY eLITMUS PREPARATION !! THANK YOU SOO MUCH SIR !!!

@srikanth7251 4 жыл бұрын

Hey you wrote the eLitmus exam. In that exam you are able to slove all the questions from this class of all videos

@adityaarun8764 4 жыл бұрын

@@srikanth7251 no i didn't appeared ...as i got placed in a well company...btw...u need to do research..coz elitmus is low scoring exam u can't solve all questions of all sections...try tips...and u will get the key to crack it...all the best !👍

@sandeepkumarbehera5458 Жыл бұрын

sir here 2 can also be written as 02 so sum of factorial is equal to 0 fact plus 2 facts equal to 3.please explain whats wrong in it

@Purva_.109 2 ай бұрын

When 40! is expressed in base Form ,what is the last non zero digit in the base 8 expansion? A.2 B.6 C.4 D.2 or 6 Plz someone help me with this question.. I'm not getting what does base 8 expansion mean here?

@PRANAYJAIN-lt7ug 2 ай бұрын

Base 8 expansion means octal system !! like 13 in decimal system implies 1*10 + 3*1 similarly, 13 in octal system will be 1*8 + 3*1 = 11 (decimal system).. This is how base 8 expansion works. Reverse this method let's write a number 25 (decimal system) in octal system :- this can be written as 3*8^1 + 1*8^0 so 31 (octal system). So you might get the core idea. We find the exponent of 8 in base 8 expansion first. Say 64 in decimal system would be equivalent to 100 (octal system) :- 2 trailing zeroes {Reason :- 64 = 1*8^2 + 0*8^1 + 0*8^0)}. Find exponent of 8 in 40!. For this you need to find exponent of 2 first. Let me ease this up for you you will get 2^38 so basically 40! is exactly divisible by (2^36 * 2^2) which is same as 4 * 8^12. What does this imply ?? This implies in base 8 expansion 40! will have 12 trailing zeroes with last non zero digit to be 4. You may ask that we are talking about divisible by 2^38 not exactly 2^38 so assume 40! = k * 2^38 = 4k * 8^12 (No other prime contributes to 8). And can k be an even number ?? NOOO.. all powers of 2 have been used up.. no other prime is even!! k is an odd number. So can we get another power of 8, NO ?? So 40! will have 12 trailing zeroes and last non-zero digit would be 4 !! (ANSWER IS C)

@mohammadyusufansari5288 2 жыл бұрын

Sir please tell me why we will factorized 70factorial by 5

@Ammathovyshu 4 жыл бұрын

Sir where we can find quizzes

@vikrantrajput14 2 жыл бұрын

Why this video is not included ni playlist??

@salonideoda2929 6 ай бұрын

In the last question where did 3 come from? Someone explain

@divyanshuranjan5239 3 жыл бұрын

Great lecture sir❤️❤️🔥. But you made an error in first question. Highest power of 7 in 145! =22 You wrote 21 by mistake. Keep uploading more video if required. Ty

@soumendramohanbagchi8207 Жыл бұрын

19*7 =133 the highest power of 7 will be 22 there but never mind we all are human, Thanks for the video.

@rahulanand2333 4 жыл бұрын

Can you provide us the list of questions according to the topics

@yashagg9767 3 жыл бұрын

U r god of aptitude quants

@yashagg9767 3 жыл бұрын

Sir i want to contact u ,plz share ur telegram link

@yashagg9767 3 жыл бұрын

I want to ask a doubt related to cat

@nuwanda2002 2 жыл бұрын

In the last question , why are the numbers after 44 not being taken. Could you please clarify

@amritadubey66 Жыл бұрын

Yes! And it could be 23 also I'm right or not🤔

@shresthraj5098 Жыл бұрын

Sir this video is not the part of the playlist. Please add

@user-ym8rb1wk9c 11 ай бұрын

Where can I find quiz videos sir?

@kathakahanimovies6561 4 жыл бұрын

17:32 super problem I solved it....😍

@gowthamdhanasekaran3908 3 жыл бұрын

Me too

@Transform_with_Sarvam 7 ай бұрын

But 3!= 6 and it has one digit so range will be 3

@vipintiwari4126 3 жыл бұрын

Sir I need same kinds of sums for practice...bcoz in other books there is diff diff things

@meghanarevankar7576 4 жыл бұрын

Sir ur Clss is nice sir all are apps they are wants money for their video sir ur Clss is free thank u so much sir

@123456789munish Жыл бұрын

Sir, this video is missing from your quants playlist, thanks

@shaambhavishrivastava2237 2 жыл бұрын

I would appreciate more if there was a louder volume in this video

@shrushtikumbhar358 10 ай бұрын

In last question why subtract 3 frm 20

@abeginnerspov5968 3 жыл бұрын

I was seriously considering there are 89 two digit numbers, but thanks. You are videos are awesome. Please make sure the audio is a bit louder. I am using gaming headphones and still can't hear you properly.

@Rodha 3 жыл бұрын

It has improved now

@ShivamKumar-yg6jd 2 жыл бұрын

Sr can you make another factorial videos? I didn't understand much more.

@rishantsingh2979 4 жыл бұрын

You make the concept so easy

@nainapujari1810 2 жыл бұрын

can't we also take 541 as abc ?

@shub576 4 жыл бұрын

Sir highest power of 7 in 145! Will be 22?

@goldera4881 3 жыл бұрын

Yes

@rishantsingh2979 4 жыл бұрын

Sir can you provide some missing topic Videos

@abeginnerspov5968 3 жыл бұрын

couldn't you take 20*7=140?

@siddharthjain7766 2 жыл бұрын

at 21:21 , the answer calculated is 63, but how are we sure that none of the other 2 digit numbers have sum of the factorials of the digitds greater than the product ? Shouldn't we be checking for some other patterns ?

@dhruv20 2 жыл бұрын

he wrote the patterns-1)10!-22! pretty obvious[try to calculate a few between them and u will get it] ,2)then numbers with 1 at end[since anything multiplied with 1 is less than that number added to 1] , and 3)numbers having zero at end as product of any number with 0!=1 is less than sum of the numbers

@siddharthjain7766 2 жыл бұрын

@@dhruv20 Yeah I understood that part, but I was just wondering about any other pattern or exception just like 22 in the remaining numbers that might satisfy the condition required in the question, apart from the three mentioned by him( that you just listed out also)

@ayushagarwal2905 Жыл бұрын

Sir in the last question it is said how many 2 digit numbers exceeds the sum of factorials of their digits. ..so it should be 90 - 17 = 73....

@lekheamsahu3628 Жыл бұрын

Yes I also think answer should be73

@commerceworldbydeepesh Жыл бұрын

It is because we just not have to take value which include 5 or greater then 5 it is correct bro 🤗

@ayushagarwal2905 Жыл бұрын

@@commerceworldbydeepesh thank you bhai 💯

@nilaypatel2524 11 ай бұрын

sir answer for last will be 15 because u have to subtract 41,and 42 also as 14 and 24 are not satisfying

@Suriya_Kishore_2001 3 ай бұрын

no ji 41 = 4!+1!=24+1=25 41 is greater thn 25 same like 42 and 43 but i accept that 14 and 24 are not satisfying and also 44

@khusi843 Жыл бұрын

7:58 3! =1×2×3 =6.. it is only 1 digit.. then how 2

@parasverma3569 2 жыл бұрын

doubt form link ?

@Narakmejao Жыл бұрын

Anyone clarify me the solution of last question plz u would be so kind

@vivekmadave9573 Жыл бұрын

Sir, please check at 04:30...

@dheerajsrivastava9063 3 жыл бұрын

Sir , highest power of 7 in 145! is 22 , how come 21??

@sankalpsingh1670 3 жыл бұрын

Last question of this video... It asks about no of digits which exceed the sum of factorial of their digits but the answer which sir found states the number of digits which do not exceeds the 2 digit number... Can anyone help me if I am wrong...also explain the answer once. Thank You @Rodha

@govindrituraj1816 2 жыл бұрын

No it's correct please see again

@Randomworldindia 2 жыл бұрын

@@govindrituraj1816 can you explain it bro? But for me correct answer is 23

@Randomworldindia 2 жыл бұрын

Last question you can also take 23 > 2! + 3! 23> 5

@AdityaKumar-ez4pr Жыл бұрын

Bro 2! =2 3!=6 2*6>2+3

@dhruv20 2 жыл бұрын

easy questions but can't think of doing such a question in 2 minutes on first attempt

@divyanshuranjan5239 3 жыл бұрын

🔥🔥❤️ 🙏🙏

@yamrajoli3834 3 жыл бұрын

sir 145/7 you find 21 but it must be 22 sir ???

@Msnsssn 7 ай бұрын

Anyone here for cat 2024 ??

@palakkathuria4454 3 ай бұрын

Yep

@pujasingh-js2pp 3 жыл бұрын

I have a doubts in last question . Because 34 , 40,41,42,43, total 5 digits So why are you 20-3=17 ? Please solve my problem

@sayandeysarkar3354 3 жыл бұрын

No,check once only 14,24,44 are exceptions

@sayandeysarkar3354 3 жыл бұрын

40-43 are satisfying

@satviksaraswat562 2 жыл бұрын

Sir in the last question , 34 is also greater than the sum of factorial of its digits hence the answer will be 18 not 17 nos. Am I right sir....????? Please clarify my doubt plz

@Muskaan-kh1ky 2 жыл бұрын

I also have the same doubt. It's also true for 24 and 14 . They also shouldn't be included.

@abhityagi8261 Жыл бұрын

@@Muskaan-kh1ky bhai simply dekho- (10-13)-4 numbers then (20-23)-4 numbers, (30-34)-5 numbers, (40-43)- 4 numbers , adding these-4+4+5+4=17 i hope this helps dude.