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

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Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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CAT PREPARATION 2024
How to Prepare for Quantitative Aptitude
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27 фев 2018

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Комментарии : 239

@nikhilbhalla1825 5 лет назад

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 лет назад

Sorry yaar .. human error :P

@VinodSharma-fx8gh 5 лет назад

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 лет назад

@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 года назад

yesssss

@BharatSingh-mi9xo 4 года назад

@@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 года назад

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 года назад

How was your score in cat?

@bikashpatwa189 Год назад

kon sa coaching

@imyours777 Год назад

how was ur Cat prep from unacademy??

@reshmatakalkar1201 Год назад

@madhumita rajnikanthan, he went on to score 99 percentile

@mrinalb3972 Год назад

@@reshmatakalkar1201 how do you know

@ayushkanojiya577 4 года назад

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

@sahilkushwaha5864 Год назад

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

@quarkismagical 4 года назад

Wonderfully explained! Thank you so much Sir!

@vedikaawal8482 3 года назад

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

@soahampandey8821 3 года назад

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

@anshikachaudhary8178 Год назад

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

@kishankumargupta275 Год назад

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

@pallav7593 4 года назад

I've so much respect for this person.

@nandinitripathy1999 5 лет назад

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

@Rodha 5 лет назад

Thanks

@heygauravtaneja 3 года назад

Have you cracked CAT 2019?

@aniketsurwade9642 Год назад

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

@adityagoswami8730 3 года назад

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

@simranmishra3059 2 месяца назад

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.

@akshayborde9062 4 года назад

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

@kalpeshbadgujar855 4 года назад

Thousands of rupee content without fees,than you so much

@mehta.shubham96 5 лет назад

bhut mast maza aa gya

@trendingshorts8092 Год назад

this type of content should be appreciated by everyone thanks sir

@kloayednap1699 2 года назад

Sir your explanation is amazing 😊

@jithins7085 4 года назад

Thank you so much Sir, excellent videos

@sayandeysarkar3354 3 года назад

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

@Ananya.RC. Год назад

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

@ektagupta1701 Год назад

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 месяцев назад

Kaunsa clg mila?

@Rohit-lm9mn 5 лет назад

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

@ShekharSingh-fr3sh 2 года назад

What percentile u got in ur CAT exam?

@narkhedejayesh3589 3 года назад

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

@cumulusmusic100 9 месяцев назад

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

@ShashankNS-je5pm Год назад

Thankyou Sir for Everything 💙

@manishpatel-ng2tq 4 года назад

excelente concept sir

@nitishsou7439 3 года назад

Great concept sir

@nitinparashar8977 5 лет назад

Kahan se laate ho sir ye questions ?? Super Sir

@Msnsssn 7 месяцев назад

Anyone here for cat 2024 ??

@palakkathuria4454 3 месяца назад

Yep

@Sukhhhhhh Год назад

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 Год назад

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

@Sukhhhhhh Год назад

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

@bikashpatwa189 Год назад

@@Sukhhhhhh tq and best of luck for Cat

@neeravd6553 Год назад

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

@ishasingh4736 2 месяца назад

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

@AshishPal-sh2yo 4 года назад

Sir where will i find the quizzes?

@manthansahu5582 3 года назад

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

@himanshikiduniya 2 года назад

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

@Randomworldindia 2 года назад

@@himanshikiduniya what's the problem ?

@adityaarun8764 4 года назад

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

@srikanth7251 3 года назад

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

@adityaarun8764 3 года назад

@@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 !👍

@mdsalmanraghib4253 3 года назад

Thank you @ravi_prakash sir🙏

@ManuSrivastava_ 2 года назад

Thank you so much sir.❤❤

@white_demon6265 4 года назад

Sir u r awesome👏✊👍

@vijaytejsiyyadri4369 4 года назад

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

@avyakaila7056 3 года назад

Sir In the last question 22 is an exception too

@dishasingh7482 2 года назад

Thank you, sir.

@ananyabhargava3966 2 года назад

Thank you so much sir 🙏🙏

@kshitijbalonie4361 4 года назад

thankyou

@haripriyareddy9749 4 года назад

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

@sunnyhotwheelss9883 4 года назад

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

@geethapriyabalamurugan115 4 года назад

How to find the doubt forum?

@rahulanand2333 4 года назад

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

@senabhi887 Год назад

The audio output is very low.

@hitandrun319 10 месяцев назад

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

@amankumar-nz1yq 2 года назад

Thank you sir..

@sadasivamsubramoniam1305 2 года назад

Thank you sir

@vipintiwari4126 3 года назад

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

@anjanadubey686 4 года назад

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 года назад

Yes i right answer 22

@chiragchaudhari6188 4 года назад

Can you please explain how 22 is the answer?

@RussianBose 4 года назад

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

@beautiful041 Год назад

We cannot divide 145 as 140

@saighodke6591 5 месяцев назад

Thankyou sir

@raghavrohilla8241 3 месяца назад

Sir aap bhagwaan ho quants ke❤️

@Purva_.109 2 месяца назад

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 Месяц назад

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)

@123456789munish Год назад

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

@diyapiparsaniya3811 Год назад

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

@Ammathovyshu 4 года назад

Sir where we can find quizzes

@soumendramohanbagchi8207 11 месяцев назад

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

@ShivamKumar-yg6jd 2 года назад

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

@mohammadyusufansari5288 2 года назад

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

@divyanshuranjan5239 3 года назад

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

@kathakahanimovies6561 4 года назад

17:32 super problem I solved it....😍

@gowthamdhanasekaran3908 3 года назад

Me too

@user-fi6ec3jv2f 7 месяцев назад

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.

@salonideoda2929 5 месяцев назад

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

@rishantsingh2979 4 года назад

Sir can you provide some missing topic Videos

@vikrantrajput14 2 года назад

Why this video is not included ni playlist??

@shaambhavishrivastava2237 2 года назад

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

@sandeepkumarbehera5458 Год назад

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

@Transform_with_Sarvam 6 месяцев назад

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

@yashagg9767 3 года назад

U r god of aptitude quants

@yashagg9767 3 года назад

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

@yashagg9767 3 года назад

I want to ask a doubt related to cat

@vivekmadave9573 Год назад

Sir, please check at 04:30...

@arnavpuri6631 Месяц назад

just a doubt, should not the answer for the number whose product of factorial of digits is greater than the sum of the factorial of its digit be 64 rather than 63?

@abeginnerspov5968 3 года назад

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 года назад

It has improved now

@shresthraj5098 Год назад

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

@meghanarevankar7576 4 года назад

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

@user-ym8rb1wk9c 10 месяцев назад

Where can I find quiz videos sir?

@ayushagarwal2905 Год назад

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 Год назад

Yes I also think answer should be73

@commerceworldbydeepesh Год назад

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

@ayushagarwal2905 Год назад

@@commerceworldbydeepesh thank you bhai 💯

@rishantsingh2979 4 года назад

You make the concept so easy

@Randomworldindia 2 года назад

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

@AdityaKumar-ez4pr Год назад

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

@spkbusinessD-- 2 года назад

shivam kamat (9) 3-8-2021 thank you sir🙏

@dhruv20 2 года назад

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

@shub576 4 года назад

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

@goldera4881 3 года назад

Yes

@nuwanda2002 2 года назад

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

@amritadubey66 Год назад

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

@Narakmejao Год назад

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

@divyanshuranjan5239 3 года назад

🔥🔥❤️ 🙏🙏

@khusi843 Год назад

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

@sankalpsingh1670 3 года назад

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 года назад

No it's correct please see again

@Randomworldindia 2 года назад

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

@nilaypatel2524 10 месяцев назад

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 2 месяца назад

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

@shrushtikumbhar358 10 месяцев назад

In last question why subtract 3 frm 20

@nainapujari1810 2 года назад

can't we also take 541 as abc ?

@abhilashnanda1808 4 года назад

Question no.1 answer should be 22

@siddharthjain7766 2 года назад

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 года назад

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 года назад

@@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)

@abeginnerspov5968 3 года назад

couldn't you take 20*7=140?