Divisibility Rules 1 || Number Systems || Quantitative Aptitude || CAT Preparation 2024

Number System by Ravi Prakash | Quantitative Aptitude for CAT 2024
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[@pranavkumar-yn6ig]

For those who are having confusion....first watch lectures on Remainders which begin from lecture 14 and come back here.

[@nandhinib27]

Thanks..!!!

[@akankshaporwal5566]

Hm thanks

[@ayansanger1400]

Thanks

[@bitanroy4602]

THNAKS BUDDY

[@Sj969.]

Thankyou

[@suryavoroy3527]

for checking divisibilty by 11 proof we make use of minus remainder , brilliant concept!

[@truptinarkhede4850]

U are a legend!❤️ A man with huge knowledge of core concepts. Respect+

[@ritesh4429]

Hey Can you please tell me how much percentile U got in CAT. So that I can observe is this enough or I should study more...?

[@harshalbarve9091]

Why are u looking for proofs? Attend his lectures and you will see why people adore him. Best faculty when you want to go from basics to advance.

[@monilhingad6774]

@rodha sir I would like to draw your attention towards a small correction in playlist. Please update the remainders video series prior for this video. Thank you and God bless you sir.

[@divyanshuranjan5239]

Watch all the remainders lectures first and then divisibility rules. Ur wellcome.

[@veerrajput7875]

Thanks...

[@h96vardhan]

Thanks bhai

[@experimentointerneto902]

Can u tell the subtopics arrangement of how to watch??

[@experimentointerneto902]

@Sim Sidhanti Then what about factorials.. I guess even that is putted way before... And it should've been posted at the end right

[@experimentointerneto902]

@Sim Sidhanti Ohk .. Atlast.. Acc. To you ,are his videos enough for cat prep?

[@sudeshnasarkar4926]

the last answer was not clear (634-189)*3 digits we have . why did you divided it by three???

[@nidhibind8288]

Beacause after 99 ,number started with 3 digits

[@jaisibisivakumar3157]

Such a nice explanation sir. Thank you for offering these lectures

[@shristisonker6965]

Sir in the last 5 digits why did you take 2 from 248 and didn't stop at 247? Please explain? Thanks you!

[@shristisonker6965]

Is it because 248 is 82*3+2 and we just have to add 1 from (143*3+1)? So we just took the remainder of the last number (248) which is 2 from (82*3+2)?

[@omkarshreyakar]

It's because in 148×3+1 we have +1 na so we have to add one digit extra which is 2 from (248).

[@shristisonker6965]

Yeah I got it thank you so much.

[@sambitmahapatra8240]

For last question, I think the last 5 digits should be 61471 as 147 would be the 148th term from 100 and one more extra digit (1) is added at the last .Can anyone clarify

[@shaharbanomalik2881]

Starting yhi lecture sw h ??

[@ayushbajaj8328]

Sir which authors books has to be preferred for preparation.

[@saiyamagarwal270]

I have a query For eg if we choose a random number like 54342276/11 r=? (r= remainder) then Solution= [(5+3+2+7)-(4+4+2+6)]/11 r=1, then if we check with equation like 11y+1= 54342276 then y should be natural number or it can be in decimal? please correct me if i'm wrong in any step.

[@avieroopghosh9070]

y will be a natural number,that is it will be a quotient by when the big number is divided by 11

[@heshamahmad4101]

if we go more specific it will be a positive integer

[@sakshamgupta3276]

Concept level, God>>>>>>>

[@abdealiattarwala3335]

dividing 1 by 11 should leave remainder -10 if we're considering negative remainders

[@rohit49..92]

Thank you sir ...........

[@vaishalitayal1443]

Why are we dividing N/32 in last question

[@brijeshshetty7448]

that's the question, to find remainder when N is divided by 32.

[@aditisrivastavaas3177]

Would you plz explain last question fully??

[@brijeshshetty7448]

You need to find Remainder of N/32, where N is given as 12345...634 digits which means N contains 634 digits, You know the divisibility rule for 2^n, so even if you find remainder for just the last 5 digits of N, that will give you the answer. Now, 1 to 9 contains 9 digits obviously, 10 to 99 contains 180 digits (90 numbers having 2 digits each). So, 9+180 = 189 digits. You are left with 634-189 = 445 digits. Since all numbers after 99 contain 3 digits, you make groups of 3, that is you divide 445 by 3, that gives you 148 + 1 extra digit. Now, you add 148 to 99, that gives you 247. Remember you have 1 extra digit, so you use only the 2 from next number (248) So your number becomes 2472 That is 4 digits, you want 5 digits so you take only last digit of the previous number that is 6 from 246. Finally, you get last 5 digits of N that you were looking for, that is 62472. Now just divide by 32 as your question demands and there's your answer 8. Just to help visualize, the last few digits of N are like ...2422432442452462472 We only needed last 5 digits in this question to find Remainder.

[@anirbanbasu8002]

Thanks a lot sir

[@BHARTIYAaYODDHA]

Video number 9 kaha h sir?

[@himanshusain4404]

Bro did you found that ?

[@Randomworldindia]

@@himanshusain4404 playlist mai ha

[@satishchodisetti7896]

Playlist of videos are not arranged correctly,,remainders are not completed yet,but u told that u r already completed in previous videos..getting confusion sir please arrange them orderly..or make a video to watch according to topics ,or on playlist,,please sir

[@pranavkumar-yn6ig]

Bro videos regarding are remainders are from lecture 14 onwards...first watch them

[@dubey1akash]

thku sir ur lecture is very grt thku by heart

[@mahimabhola2908]

Thnks 😊😊❤

[@Mrupsccse2024]

Last solution didn’t get it sir😢😢

[@surabhizol9199]

woow, great concepts

[@manasdugtal1078]

thank you, sir!!

[@bikashpatwa189]

Is there any one from Catking or any other coaching which is good. Actually I am about to join catking so I want some honest review or any other suggestion form seniors for online coaching cat2023. If u can plz help me out its very hectic to find good coaching online.

[@ankitsinha5382]

Why CATKING ?When you are to join a coaching study from the legend himself, Ravi Prakash Sir. He teaches at Unacademy. He takes 2 to 4 hours of daily live classes there. Full Quant, DILR, Decision Making, GK.

[@bikashpatwa189]

@@ankitsinha5382 I was not aware about sir unacade my classes tq for that. so app vi prepare kr rahe ho ya through unacademy

[@safednirma6154]

Thank You 🙏🏻

[@VayuputraBhakt]

Last mein lag gye nothing understand 😂

[@318dhanush5]

Sir can we get the notes

[@dishasingh7482]

Thank you, sir.

[@amantiwari1916]

sir how 10/11 gives remainder of -1 or any reader of this comment can explain pls

[@suneetmishra1890]

watch video on remainders first

[@vasubansal4154]

Thanku sir

[@ajonlineid3919]

For divisibility rule of 11 can we use that odd power will give -1 as remainder

[@trishabiswas2043]

Sir why dividing by 25 in 1st Q

[@chandranibharay416]

Because the 1st rule was for 2 & 5 only. and 25 = 5^2, so it is applicable to use 25 also.

[@Gautam_OG]

21:00 29:00

[@pratikkumar7069]

last question is a bit confusing can anyone explain?

[@sachinbhuvanes4000]

Take simple examples.... Take 1 to 100..(here finding the 100 is going to be ur target ) The question given was Q: 1,2,3,4,...x 192digits are there, find the last number. • U know 1 to 99 has 189 digits Now subtract 192-189 = 3 digits left U know after 99 each number has 3 digits, now divide the answer (3/3= 1 no) 99 no + 1 no = 100 I've tried wid my understanding pardon u find this difficult .😅

[@PANKAJGUPTA-fx3vr]

Sir how 10/11 remainder is -1 ???

[@shreyasahoo632]

Positive remainder 10

[@Randomworldindia]

Bro 10 divided by 11 = -1 remainder Remainder can't be in negative so, 11-1 = 10 ans We always Subtract divider from negative remainder

[@Randomworldindia]

Yeah 🔥

[@nikhilkhatri1344]

How is 62472/32 r=8????

[@Rodha]

Means

[@nikhilkhatri1344]

Sir How 62472 divided by 32 gives 8??

[@kalpeshrajput7897]

62472/32 = 8 can someone explain

[@siddharthjain7766]

8 is the remainder and not the quoteint. Notice, he has added a vertical line and R showing that he is calculating the remainder and not the quotient.

[@034seca3]

sir ke ghar me drilling ho rhi hai 🙂

[@souravsushil4251]

In d case of 11 if it sum of digits at odd places minus digits at even places wat if the last term is at an even place?

[@omkathe3599]

You have to count from left to right. So unit digit will be always at odd place.

[@harshadnotmehta]

WHo else is here because of Understand UPSC

[@vijenderkumartailor9948]

Sir how can i get quizes of quant ?

[@kavyamanoj932]

very complex !! im sorry but please make it lil more easier , instead of complicating it . or explain in a easir way , it looks like you are just talking to yourself.

[@Wizard12637]

Any upsc fellows

[@veerreddy1818]

Thanku sir for helping me master number system......if i am ever selected in iim i l give its credit to you also

[@makingmoneyathome3590]

Are you got selected in any iim??

[@sidsiva3073]

@@makingmoneyathome3590 no way man. did you just ask him that after reading his comment ? he couldn't form a simple sentence. no offence dude but you got to be really good at english while it comes to clearing CAT with excellent scores.

[@Surajjj]

​@@sidsiva3073kya baat hai bhai, doosro ko English ka gyaan pel raha hai when you have mistakes in your comment as well. Support people rather than bringing them down.

[@shreeyabhalla8708]

Can you clear a doubt of mine

[@cumulusmusic100]

Thank you Sir🙏

[@SparshSaxena-jn5ow]

Have upsc didn't raise the csat standards in cse 2023, i wouldn't have be here😢😢.

[@karthikmadhusoodanan7274]

divisibility of 2 & 5, 3&9, 11 ...and then digits counting.!

[@spkbusinessD--]

shivam kamat (10) 5-8-2021 thank you sir 🙏

[@gaminguniverse7459]

26:40hhahahahahahahahaha

[@srishti155]

Sir, can you please number the videos in a sequence in the playlist, so that we can watch in the correct order. That will be a great help. Thankyou

[@P.verma0]

Before divisibility...watch reminder concept videos....

[@SatyamRaj-zl4sb]

bhai remainder ke pehle factors na ? @@P.verma0

[@P.verma0]

@@SatyamRaj-zl4sb hnji... Or Bhai nhi bhn 😅

[@SatyamRaj-zl4sb]

@@P.verma0 aage ka sequence kya he list ka ?

[@P.verma0]

@@SatyamRaj-zl4sb actually abhi Mera khud ka divisibility tk complete hua hai...aage ka ab continue krungi...

[@ss_shruti10]

Lecture 10 missing sir..

[@sarthaksharma3363]

Lecture 9 is missing actually in the playlist

[@himanshusain4404]

Did any one got lecture 9

[@rkcoolcenter7678]

really amazing and helpful i just started prepration and i enjoying it a lot earlier i use to hate all these thing now i am getiing interest. Thanks sir for your support!!!!!!!

[@khananas4019]

Yeh jo quant ki playlist hai kya yeh sufficient hai

[@manavim3093]

Yes they did cover the whole syllabus. After watching the concept videos do refer to books too like Arun sharma or any other

[@ayansanger1400]

Sir why is (9:38 ) video part …. Why is 100 not divisible by 2(3) cube while 1000 is divisible by 2(3) cube ?

[@rehnumanaqvi7529]

When we divide 100/8 = 4 is remainder. But when we divide 1000/8 it will be cancelled and 125 is quotient. Hope you got it now.

[@dataaccount1699]

Sir, is this playlist arranged or can you please tell the sequence to watch it?? Because in starting, you have told us that we have covered these many topics and it is not done yet till this playlist

[@P.verma0]

Before this video...watch the remainder topic videos....then divisibility video

[@shohanbiswas4129]

Last 5 digits means = 47248( because last is 248) but why you left last two digits "48" and calculate 5digits like = 62472?

[@saptarshidas488]

Because last 2 digits 48 is out of scope of 634 digits as given in the question

[@PavanKumar-hm6ze]

Yup we don't have to add any number to get 247 as 248 We just have to concentrate on digits..... I mean we have to add a next digit like 2472

[@rishikeshmathapati4264]

Brilliant way of teaching🎉❤

[@sarahkansal8598]

Rodha❌Yodha✅

[@edifier_shay]

Thank you sir for the wonderful lecture! i am gonna crack CAT 2024 easily!🎉 i have made a study group for cat aspirants, details are in the about section of my channel.

[@DhanushUpsc]

For Upsc aspirants skip tp 11:00 onwards.... Understand Upsc

[@durgaprasadreddy7869]

Thank you

[@Drishtikashyap24]

Ok

[@rashikajain2252]

Why he added 99 and 148? Can anyone explain please?

[@Chutkule-]

Sir isn’t the answer would be 2 for last question?

[@charan6788]

At 18:13 1/11 remainder is 1 , how is it ?? can anyone explain

[@sriniwonwonrajasekar4243]

remainder is 1 or -10.

[@misahhere9224]

sir , someone is knocking on the door

[@rustic1647]

Sir what about foor non perfect square

[@mayapunj9257]

Sir this lecture is very intresting and the way you explained concepts was just amazing 😊

[@Endever10]

We met again😅😂

[@chiragmaheshwari8293]

God bless you sir 😊😊... Thank you sir...

[@VishalThakur-gx3ji]

Sir where you live...I want to meet you to thank you😁

[@Rodha]

Always welcome. Bangalore

[@VishalThakur-gx3ji]

@@Rodha I will come soon to thank you ....I am preparing for cat and soon will get iim Bangalore under your guidance 🙏

[@ankitkandhel]

62472/32=8 pls anyone explain?

[@workhard0311]

divide krlo bro long divison method se

[@amlan342]

In the last answer I think remainder should be 1 instead of 8

[@supriyas97]

Divide manually and check. It's 8 only

[@anureetjuneja2903]

At 0:42 sir mentions a number of concepts and theorems that I'm unfamiliar with. Please send me the link to his videos discussing those?

[@priyankakumar7387]

Watch lecture 14

[@danishsingh4308]

I have the same doubt as you. Most probably you would have finished the whole series by now, can you help defenestrate my doubts regarding the sequence of videos. Should I watch them as it or watch the concepts he is talking about first and continue the video

[@sjsthomasnick3002]

@@danishsingh4308 complete all the remainders videos first and then watch divisibility rules.

[@tprasanyashroff2908]

After divisibility can I strt number system?

[@fahadummar8603]

Just a little doubt how 99 +148?

[@siddharthjain7766]

1 and 2 digit numbers are till 99 The number of 3 digit numbers calculated are 148 i.e. 100, 101, 102 and so on till 247(total 148 pairs of 3 digit numbers). Thus, the last 3 digit number is 99+148 which is 247.

[@karunadhingra9630]

Where this type of question like a number when successively divided by 7,6,5 the respective remainder are 5, 3,1 find the least number

[@rithikaswaminathan9703]

Where is the link to the practice quizzes that sir has mentioned? Can anyone pls share

[@Thedemonofhonesty]

last sum why 2 came after 247 and how 62472 became a last 5 digit ??????

[@anubhabmajumdar9507]

this is excellent content..he teaches really well...just from scratch

[@ritishagupta329]

WHERE ARE THE VIDEOS OF SQUARING AND MULTIPLICATION, WHICH YOU KEEP TELLING AS TAUGHT IN THE LAST CLASS?

[@swethasoundar631]

yea tell me also sir ???????

[@ponnaajaybabu7991]

Mention any description to watch earlier videos

[@Yashica1401]

In sir's speed maths videos

[@meetkyada4651]

Super video sir salute

[@Mrupsccse2024]

For upsc aspirants skip to 11 min … thankful to you sir

[@shrutichauhan2787]

Sir, last question i didn't understand plz discuss it again😢

[@viveksingh-ok6il]

Im a UPSC aspirant and learning from U

[@meghasharma5708]

Where is lecture 9 ? In the series it's showing lecture 8 then lecture 10

[@a2educationandmotivation11]

Please explain last question again

[@kdas939]

Can anyone explain the last question in after 99 whats he do??

[@36_parthshrimali84]

Till the 99 , we already used digits 180+9= 189 Thus we left with only 634-189=445 digits Now how many 3 digits number can we made since we have left 445 digits, So it will we =445/3 Since 445 is not completely divisible by 3, The quotient is 148 and the remainder is 1, So we can make 148 , 3 digits number and one left single digit Then 100,101,.....247 (total 148) If we continue above series 101,102,103,...247248, we can't take the last 48 other wise the number of digits will be 636 Thus the last 7 digits are 2462472 The last 5 digits are 62472

[@monalishapani2698]

@@36_parthshrimali84 thank you so much

[@anchaldubey4232]

​@@36_parthshrimali84can u plz expln why dividing 445 by 3

[@SandeepKumar-zo9tz]

Sir remainder is 1 for last qes but you wrote 8

[@rinkugurjar2419]

Wa wa wa sir wa moze aa gye

[@chiragmaheshwari8293]

please tell me.. is Arun sharma 's CAT material sufficient for practice?

[@vasugoyal3472]

In the last question 1,2,3----9 there are 9 digits total and then 10,11,12----99 how it can be 180 digits???? Infact from 10 to 90 there are only 80 digits...

[@P.verma0]

From 10 -99 each no. Has 2 digits...that's why it's 180.

[@VipulChander]

Thank you sir

[@sarveshsawant8522]

Link for lecture 9:- kzbin.info/www/bejne/faPFqpyNq6uMraM

[@trendingshorts8092]

thank you sir

[@visible871]

Legend^10 😅

[@GaganDeep-pz1ug]

Kitna confusing hai

[@sameerraj2939]

Sir 789÷125 we don't get a remainder 39

[@nidhibind8288]

125*6=750 and 789-750=39

[@sadasivamsubramoniam1305]

Thank you sir :)

[@yashagg9767]

U r boss 🙏🙏

[@yashagg9767]

Sir r u on telegram

[@sjsthomasnick3002]

@@yashagg9767 preparing for CAT'21?

[@ManuSrivastava_]

Thank you so much sir.❤❤

[@Unstoppable745]

❤

[@himanshusain4404]

Where is 9th no. Video sir ???

[@haxtng7641]

kzbin.info/www/bejne/faPFqpyNq6uMraM