Simple Interest & Compound Interest 1 | CAT Preparation 2024 | Arithmetic | Quantitative Aptitude
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- เผยแพร่เมื่อ 10 เม.ย. 2019
- CAT PREPARATION 2024 I QUANTITATIVE APTITUDE PREPARATION for CAT 2024
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Thank you sir for explaining it in such a easy way
Love the way you explain things and giving clarity.
best explanation in an easy way
U are a gem sir
Thank you so much sir. Your tutorials are gem ✨
general engineer male
best way of teaching
Came here cuz SICI is my weakest topic, loved to see how you haven't told a single formula in this to make us conceptually strong!
14:40 EVERY 7 years this means after 14 years 200 becomes 400 ?? the word EVERY is confusing
Every 14 yrs ₹100 becomes₹400
exactly
Great work,keep it up
Hiii brother is rodha tech basic to advanced level?
In the last problem in case for simple interest the amount becomes 81 times at 600 year's
Those questions that seems to be difficult for me to solve during my school days, u have taught that to me in the most easiest way
Sir please upload all videoes
Thankyou sir
@Rodha, sir in case of the question if the value is large we may need to use some formula?
its following a gp , so n ie. number of years can be calculated by an= ar^(n-1)
Great work😇
This lecture will help for ipm?
Thank you sir
Can someone point out an error in q3
thank you, sir❤
Complete Conceptual videos
You are
Fabulous 👏
⭐️⭐️⭐️⭐️⭐️⭐️
11:00 question
How can a sum double itself in SI ? If it is 100 at year 1 then after 7yrs it is 200, after 14yrs it should be 400, otherwise the statement does not make sense.
With an increase of Rs 100 every 7yrs we get 100, 200, 300... but 300 is not a sum doubled.
think of double as 100% rate of interest of the original principal amount in SI.
100 after one year doubles to 200, in next year it would be 400 if you consider compound interest as 400 is the double of 200 which is the new principal.
however it is 300, because you consider 100 as your principal and 100% rate of return on 100 is 100, so 200+100=300
Yes. Statement doesn't make sense
Thanku sir
how will we use formula?
thankyou sir
In simple interest questions, doubling in every fixed number of years doesnt make sense to me. In compound interest it might be possible, but in SI, the term "every" doesnt just fit. I am confused.
The question makes sense if we use the term "first n years" rather than "every n years"
Thank you so much sir.❤❤
in question no. 1 y didn't we use 8242/2 if the amount is after 8 years
It's the case when question ask for CI
Sir, in Sum double in 7 years question
Sir every 7 years doubling means sum would be 16 times in 28 years. That is 1600. So sum is 1300 somewhere in between 21 to 28 years.
I cannot understand why i should opt for unitary method there. Please re-explain sir kindly🙏
Although I have understood easily what you did there, but why the sudden change in line of thinking sir, please reply
I am assuming that you are talking about the question at 14:40.
The question is of simple interest where principal amount and interest per year remain constant. So, a sum doubling itself implies that the total in interest in 7 years is equal to principal amount (Note - Every year you'll get the same interest for SI).
7*SI = P
Si = P/7
------------------------------------------
You want to find the time it takes for the sum to become 13P. So, SI here is 12P.
time = 12P/(SI) = 12P/(P/7) = 84 years.
@@VinayKumar-vk3tq Thank you, I am grateful.
Are you self preparing or taking coaching, bro?
@@VinayKumar-vk3tqBro it's saying that a sum doubles in 7 years...what if we take our sum as 50Rs...This isn't working on this...why?
@@AbhishekSingh-ny6ds yaa exactly..every distinct amount coming with different answers...but if we go exactly what ques is saying the ans for every amount coming b/w 21 to 28 yrs...
At 15:25 why 12×7?
Please someone explain
this guy explains simple calculations in so complex way
but those complex way make the bulky calculation simple... even i was very annoyed but when first started watching his lectures on percentage but gradually i realised his intention of teaching those methods and now i love his teaching style to be honest
Is there a reason why PRT/100 formula is not introduced at first?
Just so you could understand what actually si is!
A sum doubles itself at SI... in that question towards the end, why did we multiply 12*7?
see the question properly its sum doubles in 7 years & in every 7 years bank is giving us 100 rupees interest we only need 1200 interest right so by unitary we can find because in SI ROI is fixed
Think link that 100 rs in 7 years
1200rs in x Years
So that 100*x= 1200*7
x=84
@@shubhamsharma-db9eb Thanks buddy
@@shubhamsharma-db9eb Thank you shubham
Actually the way he has written the question is wrong instead of every 7 years it doubles he should have written that the amount double in 7years , find out how much years would it take to be 13 times of itself .
In the 4th question (sum triples in 12 yrs) why it's 11×6 y not 11×12 ?
200/12 rate per annum
👏
It seems you have deliberately removed some videos ( 1-2 ) for each section. Please let me know how can I get the full videos
don't jump to deliberate judgements. you're getting some quality stuff for free. show some gratitude dude and be respectful.
@@satyabratsrikumar whats the point of giving incomplete information, "partial knowledge is a dangerous thing"
The reason for videos being deleted is because there were a few errors in those videos.
Where is ( 1-2) deleted,they both are in the the playlist
@@satyabratsrikumarhe wasn't rude in any manner.
charan sparsh
how can simple interst double any amt EVERY 7 YEARS. only the first 7 right
yes
can anyone explain this that in the 4th question at 18:42 why we are multiplying with 6 and not 12??
You can understand it this way -
Sum becomes 12 times ( take sum as 100 ) means intrest he recieved will be 1100 Rs
12 years 200 interest
12 × 5 Years = 1000 interest
12/2 years ( 6 years ) = 100 interest
60 + 6 years = 1100 Rs
@@vanshjain8057The reason for multiplying with 6 years?
100 -> 300 in 12 yrs
500 in 24 yrs
700 in 36 yrs
900 in 48 yrs
1100 in 60 yrs.
Now in next 12 yrs we will get 1300
but we want till 1200
So in next 6 yrs we will get 100 more and we will stop there
i.e. 1100 + 100 = 1200 (60 yrs + 6 yrs)
in one question why you multiplied by 6 ???? why not 12 ??????
Yess can anyone please explain this..?
Coz a person gets 200 interest in 12 years :. 100 interest in 12×100/200 =6 years .Its just same as 2 books is of rupees 6 then 1 book will be of rs.3 (2×1/6).
Why did he multiply 11*6 ?? If the interest is 1100 rupees ??
@@madhuribeniwal1060 it's actually unitary method 1100/ 100 *6 equals 11*6
1:20
I can't understand difference between last 2 questions. Can anyone explain??
@@dikshabihani3007 but how the last 2 questions has si and ci but the way of solving is same and calculations are also same
@@lucascruze416 we are not focusing on si ci specifically because rate percent is not given. The question is only entitled to ask what will be the principal amount after a certain time, that is why they are solved in same manner
@@dikshabihani3007 can you tel answer of my Dout ..my Dout is in question of sum triples itself every 12 years at SI then wt will at 12 times they asked na ...in that sir why did 11×6 ? It should be 11×12 na bcz they told 12times not 6 times ..this I getting confused so can you tel?
I think we have to calculate on how much is being added to the principal amount.. So in order to get 300, 200 is to be added and it requires 12 yrs.. And in the second case, in order to become 12times, 1100 should be added..
200-12
1100-?
1100*12/200=66yrs.
@@kalyanimadem9991 yeah I guess you are right Kalyani😊
In 3rd question ,if the amount becomes double for 7 years ,100 became 200 in 7 years ,then for next 7 years it should become 400 naa 🤔 because it should be doubled...y it becomes 300 in next 7 years..i couldn't understand this thing ...even its for simple interest ony ..but the amount should be doubled naa...is it the wording of the question wrong or my understanding skills are poor ?? Can some explain ...??
That would have been the case if this was compound interest . Here it is simple interest that means on every 7 years the sum increased by 1 x the principal amount . Here the wording is bit wrong , the sum would double for the first 7 years hence add 100 for every 7 years
nice one
@@vishalkalita2212
Why 12×7 ? I don't understand
15:57 In this question, for everyone in doubt
In SI, the amount (P+I) will be 13x the principal in 22.75 years
However, the interest (A-P) will be 13x the principal amount in 84 years
Last question intrest 100-300-600-900 ....
Butt??
it triples itself 100-300 then x3 = 900 then x3 = 2700 x3 = 8100
@@bestshorts2762 thank you broo
in one question why you multiplied by 6 ???? why not 12 ??????.......Anyone
plz explain
Please mention the question number or time stamp for better clarity.
The sum triples itself in 12 years ==> Interest in 12 years = 2PI. => Interest in 1 year is P/6. So, 12 times the sum will be equivalent to an interest of 11P. Time taken = 11P/(P/6) = 66 years
I’m in times n you’re teaching way good than them sir.
Hi how's your study going?
@@theharshkashyap ahahahha sab janna hai tujhe ;)
Thanx
time sucks
Same me bhi times Delhi me hu
The person himself is so confused
Thoda effort put Karo bhai. Bahut detail me samjhaaya hai
thank you sir