Ratio 5 | CAT Preparation 2024 | Arithmetic | Quantitative Aptitude

[@suyashdayal]

In the station and fare example, we can save time by going with the option. We can see the ratio of the total amount collected between the first class and the second class is 4:40 I.e 1:10. When we go by the option, we are looking for a number when it is added to 10 times itself will give 1100. Clearly, 100 is the only number to fit in that ratio. Hence we get our answer.

[@WWEAllROUNDER]

Ohh it helps thank you

[@66dipeshmewati8]

Genius

[@priyankasahu4663]

Thanks

[@B-SharpBenchmarks]

Nice. Jeenyus

[@akshatraj7623]

i didnt understand ,someone plz explain

[@muskangarg2361]

Voice is too low....but he provide free best classes on u tube...so pls Cooperate kro...use earphone...dont blame to sir ❤✌

[@FUNNY-vk1ej]

Who say voice low

[@amazingwonders6926]

Full voice h bhai

[@khushaljohar3911]

voice is perfect

[@shanmukhasharma1947]

Agreed...we must cooperate...voice is little low

[@kronikevaporation6007]

Tum log aise baat karte hp jaise criticism dena paap h. Logo ki bhalai ke liye bhi criticism diya jaise sakta h

[@laliga3045]

The rupee question you can just write no of 50p coins as 220-4x. Then equate their prices , x/4 + (220-4x)/2 + 3x = 160. No need for 2 variables.

[@KlutchyRex]

why 4x ?

[@laliga3045]

@@KlutchyRex one 25p coins = x, therefore one 1 Rs coin = 3x, so in total these are 4x coins. Therefore the total no of 50p coins = 220 - 4x

[@KlutchyRex]

Thank you

[@theashwinijha]

Awesome, thanks!

[@white_devil..]

​@@laliga3045but now our X is 40. Then 200 - 4×40 = 200 - 160 = 40 Then how Y = 60 ? 😢

[@manahilarif3196]

Best videos on KZbin for aptitude preparation.

[@shresthsingh6745]

6:28 Had 2,00,000 p.a. been a good amount of salary, I wouldn't be watching this video right now. XD

[@snehatsamuel30]

Me too lol

[@abhilashaa2799]

i think ravi sir meant it as 2,00,000 per month xD

[@uncertain2135]

@@abhilashaa2799it's per month.u r misconstrued bhai

[@abhilashaa2799]

@@uncertain2135 uhh that's what I said?? I think it's you who is misconstrued.

[@uncertain2135]

@@abhilashaa2799 nikal le eha se

[@ishwerchandrapandey1265]

best maths teacher ever seen

[@rishikaraj1126]

The Jai and govind question - best and shortest way to do it . J:G =5:6 , J= 4:5 (2016:2017) Just equate 5 and 4 as both are of 2016. Similarly for govind. Make it equal and you will get - J:G = 20:24 J = 20:25 and G = 24:32 Now we know 25+32 units = 570000, so 1 unit = 10000. Simply J ,2016 salary is 2 lakhs and G is 2.4 lakhs

[@poojadas7606]

I didn't get it. How to make it equal can u please explain.

[@rishikaraj1126]

@poojadas7606 5*4 (LCM) = 20 and 4*6(LCM) = 24

[@adityaKumar-l3z]

At 27:00 The New quantity of Milk & water in vessel A (after removing 10 l) = M:W = 16 : 4 => 4:1(divided by 4). Atlast instead of adding 19/3 to 16l.I think it should be milk = 4+19/3 water = 1+11/3. Please correct me some one if I am wrong.

[@Anonymous-m-a-n]

earlier vessel A had 30L of mixture in 4 : 1, after removing 10L ( 2L water + 8L milk ) , quantity left is 16L of milk & 4L of water. you should add 19/3L of milk to remaining quantity of milk i.e. 16L, same case is with water. what you got wrong is - you simplified the quantity 16L & 4L to ratio 4:1, which is wrong as it's the ratio not the quantity left.

[@sujayjadhav8093]

RODHA!! KING OF APTI!!

[@SandeepSingh-yh4ob]

Kitni gaand chatega sir kii 🤣🤣

[@k.sivaramasubramaniam5796]

Sir first sum(Salary) 4:5 - how it is 1/4th or 25%?

[@tanuloomba2713]

Same ques 😢

[@saniyakouser4183]

We are going from 4:5 and we need to calculate increase in 2017.. Taking Lcm of 4 and 5 is 20. And 5 by 20 is 1 by 4 which is 25% . Same goes for govind . 3:4 , Lcm of 3 and 4 is 12 4by 12 is 1 by 3 which is 33.3%

[@adhitiyakaarthikheyan3647]

Use this Changed value-initial value÷ initial value x 100℅ So, 5-4/4 x100℅ will give you 1/4 x 100℅ or 25℅

[@khushijaiswal4747]

@@adhitiyakaarthikheyan3647 thanks

[@Raghuwanshi_jii]

bhai hua kya selection 😂

[@Kdfor-gi-12345]

Sir, I have One doubt in last ques, if water is taken out from A ratio doesn't changes but when it is added to B it's ratio m:w change. Again if taken out from B ratio doesn't changes but when added to A it's ratio m:w changes. Why is it so?

[@Kdfor-gi-12345]

I'm thinking over it for last 2 hours!!!

[@jaswanthnaidu3042]

@@Kdfor-gi-12345 because you have already taken 10L from A,8 milk and 2 water.

[@Theo09854]

how to do salary wala question through ratio wali trick which you taught us in late 4 videos, i actually did from that method but having an issue,

[@rishikakathuria7565]

In vessel question of milk and water how 19 :11 comes

[@owaowa8442]

the way you explain makes the questions appear so easy even the cat level ones

[@spandanachandragiri2373]

Sir what if we don't narrow down the number 38:22 to 19:11 ...is the answer is still going to be same because I got the answer differently at the end ...😬

[@Lekshmidevi-z7v]

do u know where this 19:11 came from?

[@therock4442]

In 38:22 u have to take 38/6 as their sum will be 60 but on solving u get 19/3 so doesn't matter what you take either 38:22 or 19:11 u will get same answer.....

[@naveenbaberwal12]

sir I have a doubt 🤔 on 11:35 sir why you put 13x/2 . It's 13x/4 above.

[@jetlag6969]

Because the equation was multipled by 2 It makes that 26x/4 so 13x/2

[@RohitKumar-hn9dz]

Equations q multiple hogi 2 ke aur Hui to y/2 se q nhi hui

[@khush00000]

3:40 ,, 4 to 5 , their increament is 1/4 how ??

[@kavyapande4886]

((5-4)/4)×100 = 25% increment or 1/4 increment

[@Thecrazypd]

Why you do 5-4 ?and then dividing by 4 why??? ​@@kavyapande4886

[@KjModi]

Formula= final value -initial value/initial value

[@AbhayBhadoriya2807]

Concept : 5 is how many times of 4 5 = 4 × x X = 5/4 = 1.25

[@rohitmankoti5406]

we are grateful to you for bringing such great questions🙏 Thank you, sir.

[@suresh201058]

How did sir find out that 4 is to 5 has a increase of 1/4 or 25%

[@siblesass5498]

25% IS 1/4 IN RATIO

[@adhitiyakaarthikheyan3647]

Changed value-initial value÷ initial value x 100℅ So, 5-4/4 x100℅ will give you 1/4 x 100℅ or 25℅.

[@Thecrazypd]

​@@adhitiyakaarthikheyan3647why to do that?

[@KjModi]

Formula= final value -initial value/initial value

[@knowyourworld5130]

sir can we do last question by alligation and mixtures

[@aaryannigam9552]

this milk and water question looked a bit like alligation and mixtures question, how do we distinguish that it is a ratio question

[@lastnightengineer9093]

sir if we do vessel a and b question by allegation method, answer comes more faster than this method. and all credit goes to you for teaching us like that ,making us capable to apply different approach.

[@ShwetaGupta-md6mq]

Plz show how u ve done it

[@vaibhavdhiman5313]

@@ShwetaGupta-md6mq apply allegation 2 times consider the concentration of milk in vessel B ( since that is where we add the liquid) (4/5)--------------(Z)-------------(3/5) wt ratio - 10 : 50 distance ratio will be 5:1 solve for z= 19/30 now apply allegation again for vessel B (19/30) ----------------(Y)---------------(4/5) wt ratio 10 : 20 distance ratio 2 :1 solve for Y = 67/90 i.e milk : water = 67: 23 Note : This is more time consuming

[@shashanktomar7670]

@@vaibhavdhiman5313 y-z/z-x = 1/5 iise solve karne par hi 19/30 aaraha ?

[@WWEAllROUNDER]

@@vaibhavdhiman5313 but we can do by distance method righttt

[@ilmahafeez4428]

​@@vaibhavdhiman5313why did you take 10:20 ratio and 4/5

[@ShwetaGupta-md6mq]

How to do this by aligation method?

[@rupashreenth]

Thank you so much sir for explaining in the most simpler way. You are the best sir 🙏

[@sanoritachoudhary]

Can someone help me how in B ration becomes 19:11?

[@YourHRguide]

The number of coins with A was 1/4th that with B and C combined. If each of the three were given 8 extra coins, the ratio of the number of coins with A, B and C will be 5:7: 9. The number of coins with C exceeded the number of coins with B by (A) 4 (B) 6 (C) 8 (D) 10 Sir please how to solve.

[@zeleoz463]

Ans: c) 8. But I am doing it by direct substitution method - I feel it's lengthy. If anyone knows any shortcut. Plz let us know

[@Salvatore-mr6mz]

Sir truly you are a gem

[@Rudreshkhichi]

11:38 Bhai 13x/4. Kese aya

[@AryaBhavsar]

Sir allow in calculator in CAT exam

[@SATISFACT0-96]

can anyone explain the ratio of first and second class question...i didnt quite get it

[@PrabhuKalyanMishra]

Is there any other method to calculate the salaries in 2016? As, taking this way as increment of 1/4 is bit critical in other questions. Also, why didn't we take 1 as an increment?

[@SanjeevKumar-vq8tn]

It's not difficult it's just application of percentage pcg method here 1 is 25% of 4 all hence amount is increasing by 25%... This is comparatively most easy method

[@bhavikaseth6788]

How did we get 1:3 in the 25 paise coins by second method?

[@98poojayadav62]

Given in the question

[@Patel__Rudra1]

Do anyone know in which series we should watch videos? Please guide me over

[@amalintonetta2372]

start with arithmetics . in arithmetics start with percentages,

[@priyankasahu4663]

Please post the videos with higher volume 🙏🙏

[@RupamStudy]

I have a question in 2:39 how you said that the gain is 1/4 or 20% and later 1/3 or 33.33%. How to get that?

[@ronakparakh743]

fraction to percentages = 1/4= 100/4 = 20 % and 100/3 = 33.33%

[@akshitjindal2276]

In coin question can we just multiply second equation by 2 to make it equal ? And why did we subtract second equation from first

[@armsaroundyou2352]

Learn how to solve linear eq in 2 variables bro

[@poizonbee1902]

in the paise rupee sum,why are you not adding by LCM in 13x/4 + y/2........can anyone explain

[@Aryan-ck4qs]

You can do that as well. Just take the lcm as 4 then equation will look like: (13x+2y)/4=160... Substitute further till y= (640-13x)/2. Now put the value of this y to equation 1. i.e. 4x+y=220. Solve further to get your answer as x = 40. Now back to your question. Sir is not doing this because its time comsuming. CAT is all about speed + smartness.

[@mansisharma5884]

11:08, how 13x came?

[@snehasinha6213]

Taking the lcm of denominator, 4 came as deno, now 3*4 gives 12 and one more x is present so summing it up gives 13x/4

[@vanshuk1736]

It should be 8x

[@shekharsharma5059]

Voice is too low 😢😢😢

[@krunalmalvi19_]

Can someone tell me how the ratio come 1:3 please

[@minnieplayzz9642]

25 paise = 3 times 25 paise i.e 1:3

[@entinynitin]

Answer of last question is 11/4

[@samyakjain512]

thank you so much sir for this free and wonderful course ❤ Respect ++🙌

[@satyamjidubey7789]

dear respected sir , in the first question , you got the value of x for 2017 and you used that value for 2016 but I think we should not do that , can you please resolve that issue

[@kksingh9513]

dude he normalised both year salary using x , watch the explanation again

[@anooppatel8364]

Voice is too low... Please do something for it

[@Rohit-lm9mn]

Use earphone. This is the best way

[@anooppatel8364]

@@Rohit-lm9mn I used but again not enough loud to hear and understand clearly

[@Rohit-lm9mn]

@@anooppatel8364 I just did it bro

[@almostworthy2973]

Try on External speakers eg Bluetooth

[@divnoor2chadha805]

10:07 can you please explain how the amount of 25p came out to be x/4

[@jayvyas5663]

Total amt in the question is given in Rupees format. so taking a rupee into consideration. 25 paise is 1/4th part of a rupee. So 25p as x/4, 50 paise as x/2( as its 1/2 of a rupee) .

[@akashjana1034]

Can anyone tell 13:53 timing 25pa 1rs ratio 1:3 hiw

[@deepakverma8615]

because in ratio only we have 3 quantity 25p 50 p and 1 rupee thats why its 1:3 because there is no 4 th coin

[@harshprajapati6366]

this videos are really useful as long as cat exists

[@shreyasingh1820]

I'm watching it with speakers 😂😂 feels so much like a classroom

[@ArambhHaiPrachand99]

[@okbei9577]

​@@ArambhHaiPrachand994:29

[@101_motivationsss]

Are these lessons still relevant to the current CAT scenario?

[@rama-gq7gb]

Yes ofc!!!

[@mehak485]

In the last ques of vessel how come the ratios are divided by 3 plz explain once?

[@jeevac3668]

Ratio is 19:11 which means 19 milk in 30 total mix and 11 water in 30 total mix If 19 and 11 are in 30 litres Then 19 /3 and 11/3 are in 10 litres which is what we needed.. Hope this helps

[@MishuSingh-b5z]

sir can you please explain how to cal percentage increase of Jai & Govind cause this seems a new concept :(

[@anshulbisht85]

percentage is change in values divided by initial value. For Jai it changed from 4 to 5; change is 5-4=1 so 1 divided by initial value that is 4; 1/4*100=25%

[@RohitKumar-hn9dz]

11:43 timing koi bta skta h bhai

[@shobhitgautam6960]

A mixture contains p liter water and (p-10) liter soda. If 65 liters of mixture is taken and 25 liters soda is added so the ratio of water to soda becomes 7: 11, then find the value of (p-10) x 3/4. can anyone solve this??

[@zeleoz463]

Is 45 the answer? Use allegation

[@minivarghese9874]

use alligation based on concentration of water(or soda)

[@nipunjha]

Could anyone please explain me how did it become 19/3 and 11/3 I don't understand why /3 has come

[@shrishtisuryabkalwar]

After adding A's 10 l the ratio of M:W in vessel becomes 19:11. Now 19+11 units = 10 l , 30 units = 10l , 1 unit = 1/3 , therefore now M= 19 = 19*1/3 = 19/3 same for W.

[@Anish-g4q]

In the Jai and Govind's question how did salary of Jai in 2017 become 8x ?

[@riteshmeghwal8708]

For efforts 📈

[@pineapple7086]

13:40 Can someone explain how the ratio is 1:3?

[@dayanandchaudhary3697]

Read the question again

[@Sanchofan1]

No. Of 1 rupee coins=3(no. Of 25 paisa coins).

[@tpsketch2432]

@@Sanchofan1 ohh thank u bro 💋💋

[@ArambhHaiPrachand99]

@@tpsketch2432

[@krianamikasinha]

Why are people talking about voice not about the concepts and hard work. Please Use headphones!

[@NareshKumar-ly7lp]

People were talking about voice so that he can adjust in upcoming video

[@archana3426]

How there is 1/4 when increase in salary is 4 to 5

[@kartiksharma7]

4×1/4 = 1 so increase of 1( 4 to 5 )

[@Thecrazypd]

​@@kartiksharma7how do you know 1/4 and mulitiplied it by 4 why?

[@KjModi]

Formula= final value -initial value/initial value

[@asw6656]

@@Thecrazypd from 2016 to 2017 its increased from 4 to 5 that is 4:5 right that is if salary of 2016 is 4 part in 2017 it became 5 part it increased to 1 right 1/4 part is increeased that is 25 in %

[@niyatimulchandani3454]

sir one complian from uh ur voice comes too low in all lecturesssss plz thoda voice ka dekho na

[@manishlohani9580]

Sir I have a question In fare and passenger question Like you told fare is 4rs and 1rs in ratios respectively for first class and second class And similarly passenger ratio is 1p and 40 p for first class and second class after solving we 25 times of ratio as actual amount collected Now the amount collected from first class passenger is 4rs*25 =100 Here I have a doubt that you multiplied 25 to fare price of first class but there could be a case where the price is same 4rs and 1 RS but the passengers are 1*25=25 for first class and 40*25=1000 for second class then also we will get 1100 as per options the way it correct but out of curiosity I want to ask Plzz explain?

[@ayushkumar-lr3bv]

+1

[@rahil8638]

@@ayushkumar-lr3bv its actually (4rs*1p)*25 ie, he didnt multiply 25 with fare he multiplied with amount.

[@rupalichaudhary7128]

First ques mn 1/4 or 1/3 kese kiya h?

[@aayushdeo9143]

Watch the Percentages videos, you'll understad. 5-4/4= 1/4 4-3/3 = 1/3

[@deveshtiwari9837]

At 14.10 sec how the ratio 1:3 come

[@prafullkumbhar5866]

Because 1 rs coins are thirce as 25p coins

[@chirkutmelive5174]

Govind kis clg se mba Kiya tha?😅

[@753sahiljadhav6]

Sir i think solution of last question is wrong. Because. While subtracting 10 ltr from vessel B. Milk - 6 Water-4 Ratio (3/2) Then final answer would be 11:4

[@muhammadammaraftab319]

they have reomoved ten litres from vessel b after adding ten litres from vessel a, hence ratio changed.

[@harshbharti1089]

I answered the 1st Question by making bases same then I multiplied 5 and 6 and solve X and got the answer. You can also go with this approach.

[@ShwetaGupta-md6mq]

How?

[@abhinavsabharwal2324]

bases of which which same

[@ManuSrivastava_]

Thank you so much sir.❤❤

[@bhagirathsharma7505]

Very nicely explained

[@techgamer5857]

8:00

[@legendspeaker1689]

Thank you sir 🙏

[@rancasstle586]

3:27 how did the ratio 4:5 become 1:4?

[@jorni3642]

1/4 is not ratio. It's percentage increase

[@ritikagaddellu7938]

@@akashtiwari3038 thankyou so so much🙏🙏

[@wasimtyagi7898]

M W 27.7 : 7.3 That will be the correct answer

[@vigneshm5108]

Thanks for this video sir amazing lecture

[@timanghosh6170]

Thank you Sir 🙏🏼❤️

[@niyatimulchandani3454]

and sir u r the best...bas voice ka thoda dekhlo plz

[@Rodha]

Ha. Now it is sorted :)

[@niyatimulchandani3454]

@@Rodha thank uh ji ...uh r best

[@whitedevilgaming4619]

Awesome

[@sivasudhanm6804]

Thank you so much sir 🫂

[@rohit49..92]

thank you sir for your effort

[@adarshkashyap8056]

9:34

[@asw6656]

i dont know why i still struggle from ratios

[@rishipadvi1204]

thnku sir😇😇

[@ankitavijay5759]

8:10

[@behindthescene4406]

3:27 how ratio become 1:4 ....from 4 to 5 it increases by one but how 1:4

[@dayanandchaudhary3697]

We are calculating change in salary in terms of percentage. How much has it changed (5-4=1). Now with respect to old salary we'll calculate percentage change. So 1/4 which is 25%

[@behindthescene4406]

Yas brother later I got it ... I appropriate it

[@pranavparashar8088]

there was no need of percentage method. just take the ratios like 5k/x = 4/5 calculate x this will be jai 2017 salary, similarly 6k/x= 3/4 calculate x this will be govind 2017 salary. Add both values of x equate to 57,00,000. You will get the value of k. Put it in the 2016 ratios taken in the form 5k:6k

[@arunadityarajjain1129]

@@behindthescene4406 *appreciate

[@rupalichaudhary7128]

@@dayanandchaudhary3697 5-4=1 toh samjh aa gaya lekin fir divided by 4 kyu kiya hai?? I mean 1/4 in jai or 1/3 in govind kese aaya??

[@saahilmahapatra9889]

Sir what if we try to solve the last question by alligation method? I got the answer 77:13. I am not able to figure out what went wrong. Could you please guide me?

[@ShwetaGupta-md6mq]

Plz say how u have done this last que by aligation method

[@francishensler5694]

Using alligation method, the answer comes to be about 74.44/25.56. This answer is also correct. If you divide this answer by 1.11, we arrive at 67/23

[@ExamLauncher]

Voice not clear sir... Please use good earphone

[@arunadityarajjain1129]

*mic

[@sid3827]

poor audio quality

[@SandeepSingh-yh4ob]

19:15 to 19:17 only harami will🤣

[@KlutchyRex]

anyone else with 11:4 as their answer for the milk question ?

[@neelimaacharya6157]

Pls someone explain last question... for Vessel A 5 ratio is 10 but for Vessel B 19 :11 .....How?

[@arunadityarajjain1129]

When you add 10 L from A to B, in B ratio of milk and water changes from 3:2 to 19 : 11. Now you add water from B (having new ratio 19 : 11) to A, that would give you new ratio of 67:23 for A.

[@neelimaacharya6157]

@@arunadityarajjain1129 Thank you

[@kshitijbalonie4361]

Thankyou sir

[@msaisubbarajuvarma5406]

Thanq sir

[@durgeshjha5047]

⌛

[@Aditya_aspirant1111]

legend

[@Bella-sr4kl]

❤️

[@waynerooney4674]

❤️😇

[@layashreeadepu8526]

next time please use a microphone

[@nikhilthakur6601]

or either u use a headphone /earphone lol

[@vishalchaudhary2710]

In the last question the ratio can be 3:1 also instead of 67:23

[@mindfullmallu7511]

#NGU

[@syuvapriya9084]

Xv

[@premkashyap9579]

Thank you so much sir