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

Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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[@nikhilbhalla1825]

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]

Sorry yaar .. human error :P

[@VinodSharma-fx8gh]

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]

@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]

yesssss

[@BharatSingh-mi9xo]

@@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]

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]

How was your score in cat?

[@bikashpatwa189]

kon sa coaching

[@imyours777]

how was ur Cat prep from unacademy??

[@reshmatakalkar1201]

@madhumita rajnikanthan, he went on to score 99 percentile

[@mrinalb3972]

@@reshmatakalkar1201 how do you know

[@trendingshorts8092]

this type of content should be appreciated by everyone thanks sir

[@Ananya.RC.]

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

[@vedikaawal8482]

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

[@soahampandey8821]

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

[@quarkismagical]

Wonderfully explained! Thank you so much Sir!

[@kishankumargupta275]

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

[@anshikachaudhary8178]

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

[@aniketsurwade9642]

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

[@pallav7593]

I've so much respect for this person.

[@ayushkanojiya577]

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

[@kalpeshbadgujar855]

Thousands of rupee content without fees,than you so much

[@adityagoswami8730]

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

[@mehta.shubham96]

bhut mast maza aa gya

[@kloayednap1699]

Sir your explanation is amazing 😊

[@sahilkushwaha5864]

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

[@narkhedejayesh3589]

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

[@sayandeysarkar3354]

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

[@nandinitripathy1999]

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

[@Rodha]

Thanks

[@heygauravtaneja]

Have you cracked CAT 2019?

[@cumulusmusic100]

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

[@jithins7085]

Thank you so much Sir, excellent videos

[@manishpatel-ng2tq]

excelente concept sir

[@simranmishra3059]

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.

[@ShashankNS-je5pm]

Thankyou Sir for Everything 💙

[@Rohit-lm9mn]

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

[@ShekharSingh-fr3sh]

What percentile u got in ur CAT exam?

[@nitishsou7439]

Great concept sir

[@akshayborde9062]

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

[@ektagupta1701]

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]

Kaunsa clg mila?

[@ishasingh4736]

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

[@white_demon6265]

Sir u r awesome👏✊👍

[@manthansahu5582]

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

[@himanshikiduniya]

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

[@Randomworldindia]

@@himanshikiduniya what's the problem ?

[@Sukhhhhhh]

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]

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

[@Sukhhhhhh]

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

[@bikashpatwa189]

@@Sukhhhhhh tq and best of luck for Cat

[@neeravd6553]

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

[@mdsalmanraghib4253]

Thank you @ravi_prakash sir🙏

[@raghavrohilla8241]

Sir aap bhagwaan ho quants ke❤️

[@ManuSrivastava_]

Thank you so much sir.❤❤

[@dishasingh7482]

Thank you, sir.

[@adityaarun8764]

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

[@srikanth7251]

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

[@adityaarun8764]

@@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 !👍

[@ananyabhargava3966]

Thank you so much sir 🙏🙏

[@amankumar-nz1yq]

Thank you sir..

[@kshitijbalonie4361]

thankyou

[@sadasivamsubramoniam1305]

Thank you sir

[@avyakaila7056]

Sir In the last question 22 is an exception too

[@nitinparashar8977]

Kahan se laate ho sir ye questions ?? Super Sir

[@kathakahanimovies6561]

17:32 super problem I solved it....😍

[@gowthamdhanasekaran3908]

Me too

[@saighodke6591]

Thankyou sir

[@yashagg9767]

U r god of aptitude quants

[@yashagg9767]

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

[@yashagg9767]

I want to ask a doubt related to cat

[@divyanshuranjan5239]

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

[@rishantsingh2979]

You make the concept so easy

[@soumendramohanbagchi8207]

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

[@meghanarevankar7576]

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

[@anjanadubey686]

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]

Yes i right answer 22

[@chiragchaudhari6188]

Can you please explain how 22 is the answer?

[@RussianBose]

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

[@beautiful041]

We cannot divide 145 as 140

[@dhruv20]

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

[@shaambhavishrivastava2237]

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

[@AshishPal-sh2yo]

Sir where will i find the quizzes?

[@vijaytejsiyyadri4369]

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

[@hitandrun319]

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

[@123456789munish]

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

[@divyanshuranjan5239]

🔥🔥❤️ 🙏🙏

[@Purva_.109]

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]

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)

[@abeginnerspov5968]

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]

It has improved now

[@vipintiwari4126]

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

[@official.frostburn]

21:24 should be 56. There are 9 nos with 0 (10,20,...90). 17 nos with 1 (11,12,...19 = 9 and 21,31,...91 = 8) and 8 nos with same digit (22,33...99). Total is 34. So 90 - 34 = 56. Am I missing something?

[@rahulanand2333]

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

[@senabhi887]

The audio output is very low.

[@sunnyhotwheelss9883]

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

[@arnavpuri6631]

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?

[@spkbusinessD--]

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

[@diyapiparsaniya3811]

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

[@haripriyareddy9749]

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

[@Randomworldindia]

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

[@AdityaKumar-ez4pr]

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

[@nilaypatel2524]

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]

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

[@Transform_with_Sarvam]

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

[@geethapriyabalamurugan115]

How to find the doubt forum?

[@vivekmadave9573]

Sir, please check at 04:30...

[@ShivamKumar-yg6jd]

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

[@abhilashnanda1808]

Question no.1 answer should be 22

[@sandeepkumarbehera5458]

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

[@user-fi6ec3jv2f]

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.

[@abhisheksharma-cb6gf]

*ERATA* *90-13-7-7=73*

[@shivi5031]

Why not 99- 17 why there only take 90 digits

[@ayushagarwal2905]

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]

Yes I also think answer should be73

[@commerceworldbydeepesh]

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

[@ayushagarwal2905]

@@commerceworldbydeepesh thank you bhai 💯

[@Ammathovyshu]

Sir where we can find quizzes

[@mohammadyusufansari5288]

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

[@salonideoda2929]

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

[@nk_ishant24k]

when ravi sir do mistake student gets confusion what is it concept Ravi Sir has not taught us this. ❤❤😅😅 like Ravi sir mistaked 145! =7^21 rather than 7^22

[@Msnsssn]

Anyone here for cat 2024 ??

[@palakkathuria4454]

Yep

[@shub576]

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

[@goldera4881]

Yes

[@rishantsingh2979]

Sir can you provide some missing topic Videos

[@Gautam_OG]

28:00

[@Gautam_OG]

21:00

[@khusi843]

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

[@kapil2577]

Highest power of 7 in 145 ! = 22

[@sankalpsingh1670]

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]

No it's correct please see again

[@Randomworldindia]

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

[@Gautam_OG]

13:00

[@rohittiwari7864]

Sir your videos are awsome but I think there are two mistake in it 1) the highest power of 7 in 145! is 20 2) In the last question in this video we have to find 2 digit no. Which exeed but sir has answered not exceed so the answer should be (90-17) which is 73.

[@bhumidave6683]

No. The answer is correct it will be 17 only.

[@poonampoonam4629]

@@bhumidave6683 No, he is correct. The answer will be 73 only as the question which was asked was how many 2 digit number exceeds the sum of their factorials. 17 would be the answer if the question was reverse, i.e, how many 2 digit no's does not exceeds the sum of their factorials.

[@abhityagi8261]

@@poonampoonam4629 13's sum of digits in factorial is =1!+3!=7 and 13>7, clearly 13 exceeds 7 ,and 13 is one such digit among the 17 digits we found ,so the answer should be 17 only

[@vikrantrajput14]

Why this video is not included ni playlist??

[@shresthraj5098]

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

[@Gautam_OG]

4:30

[@nuwanda2002]

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

[@amritadubey66]

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

[@user-ym8rb1wk9c]

Where can I find quiz videos sir?