QuantoLogic

Problem of the week 6th August 2017

2017-08-05T18:32:00.000+05:30

ABC is a right angled triangle with hypotenuse AC such that a circle of radius 6 passes through B and C. Th circle cuts the side AB and AC at points D and E respectively such that AD=5 and AE=4. Find BC

Time to revive the blog!

2017-08-01T16:40:00.001+05:30

I had reduced blogging considerably and hence you dont see any further posts.

I would be posting things again. Discussing Quant and Logic questions not just for IIMs but Math questions for JEE also. All encompassing blog.

The idea is to not let the brain cells die and help students on the way.

Funny video we made :)

2012-05-04T14:20:00.001+05:30

My IIM Interview Experience

2012-04-24T10:57:00.000+05:30

X: Hi come on, have a seat.
me: Thank you Sir.
Y: SO are you from Bombay or Jharkhand?
me: Sir, I am from Jharkhand currently based in Bombay.
Y: Oh nice, Ranchi is a beautiful place. Been to Ranchi?
me: Yes Sir it is.
X: So you are a Jha from Jharkhand?
me: Yes Sir.
X: So you guys so big in Jharkhand, that they name the whole state after you?
(laughter all around)
Me: Not exactly Sir. Jharkhand means the land of forests, it has nothing to do with us 'Jhas'.
X: Is it? I thought it was the land of Jhas. So you are not a Jha because you are from Jharkhand?
Me: No Sir. I was a Jha even before Jharkhand was called Jharkhand.
(laughter all around)
X: Man, I am confused now.Jha not from Jharkhand, Jharkhand not from Jha.So where are Jhas from?
Me: Sir Mithila.
X: Any famous person from Mithila?
Me: Sir, Goddess Sita. She was called Maithili as she was the princess of Mithila.
X: She is from mythology. Any other?
Me: Sir, Prakash Jha, Udit Narayan.
X: They are from bollywood. Any other?
Me: Sir, Jagannath Mishra. He was the CM of Bihar who built the famous Mahatma Gandhi Setu on the Ganga River near Patna.
X: Nice, any more?
Me: Sir, Lalit Narayan Mishra. he was the railway minister of India in 1970s. He was killed in a bomb blast when inaugurating a railway station in Bihar.
X: Can you name the station where the bomb blast happened?
Me: I am not sure, but I can take a guess if you allow me.
X: Hmmm, ok take a guess.
Me: Samastipur?
X: That's right. How did you guess that?
Me: Samastipur is one of the largest stations in North Bihar. And railway penetration in 70s was very less in Bihar. So I guessed it.
X: You guessed it or you knew it?
Me: Sir, I was confused between Hajipur and Samastipur. I guessed Samastipur.
X: Ok. Any more?
Me: Pardon me Sir.
X: Any more famous people from Mithila?
Me: Sir, I do not remember the full name but Prof D N Jha from DU is quite famous.
X: Is he famous or controversial?
Me: I think famous as well as controversial.
X: What is the controversy surrounding him?
Me: Sir, I don't remember what controversy it was exactly.
X: Do you know what he teaches?
Me: Sir, he teaches History. Rather he was the head of the history department of DU.
X: Nice, so you know about him. How do you know about him?
Me: Sir I had a discussion about his book with my brother-in-law in 2001. My brother in law also teaches history in DU colleges.
X: So you remember everything discussed in 2001? Sharp memory you got.
Me: Thank You sir. But it will be wrong to say that I remember everything. If I did, I would remember the controversy as well.
(laughter all around)
X: Ok. Now we will ask something else where you do not need your memory.
(laughter all around)
Me: Ok Sir
X: Prof D N Jha was recently involved in a vey famous case. Can you guess which case?
Me: Sir, I am not sure. I can take a guess.
X: I asked you to guess only. Do it.
Me: Babri Masjid case in the Allahabad High court.
X: Impressive, how did you guess that?
Me: I could only think of one famous case where opinions of historians was needed.
X: Right. He was one of the four independent historians consulted by the High Court.
Me: Right Sir.
X: What do you want us to ask you?
Me: Sir anything.
X: You think you can answer everything?
Me: No Sir. I meant it is difficult for me to choose.
X: So you don't know what you know?
Me: No Sir. I am very sure what I know and what I don't know.
X: Ok tell me what should we ask you then?
Me: Maths.
X: No. We have given you the rubiks cube to test that.
(laughter all around)
ME: books, football maybe.
X: Ok we will ask about both of them. You are free right?
Me: Excuse me Sir?
X: I mean you are not getting delayed or something. You don't have any appointment or anything?
Me: No Sir, I am totally free. No appointments for today.
(laughter all around)
X: Good.
The interview continued towards books, football and general HR questions.
Y and Z didn't ask anything. X was the one who asked everything.

Going to Calcutta

2012-04-19T11:05:00.000+05:30

Finally... Converted IIM Calcutta :)

IIML Interview

2012-02-13T12:23:00.001+05:30

Finished my IIML Interview.

The essay and GD topic was Insanity is doing the same things over and over and expecting different results.

Did well in Essay and GD.

Interview: Can't say much. Questions very general on my hobbies, work, studies, my hometown, problems of India etc

CAT 2011 Results

2012-01-12T11:42:00.001+05:30

CAT 2011 results are out and I have managed a decent looking 99.78%ile with a 99.86 in QA and 95.43 in VA.

I have managed calls from IIM C and L as of now, and hopefully I will manage a few more.

I was expecting a score of 75-80 in quant and around 45-50 in verbal.

An overall of 120-130

CAT 2011 Percentile

2011-11-09T15:37:00.002+05:30

We are receiving many queries regarding the CAT 2011 percentiles and we would say it is really difficult to predict anything. But the general consensus among all experts is 45 attempts with 85% accuracy should land you something in the region of 99%ile +

A case by case prediction is impossible and difficult and given the profile based calls it is highly difficult to predict calls.

CAT 2011: QuantoLogic Analysis

2011-10-27T14:06:00.000+05:30

I finished my CAT 2011 journey in the initial phases. So did some other friends who are involved with us at Quantologic. Here is our analysis.

1. CAT 2011 is a tad difficult when compared to CAT 2010/CAT 2009.
2. The data intensive complicated logical reasoning questions have disappeared and the focus is more on basic understanding of problem solving techniques.
3. The onus is on the student to solve the easy questions.
4. Every paper especially the Quant and DI section has enough sitters for an average student to crack. We must also mention that every paper has around 6-8 difficult to very difficult questions which require analytical imagination.
5. Section 1 feels short of time, you need to choose your questions well and take no more than 2-3 minutes to solve any question.
6. There are some DI questions which require lengthy calculations, but the calculations can be remarkably reduced by making smart approximations and using the options well.
7. The number of Data Sufficiency questions have gone down considerably.
8. The questions are focused on basic concepts and formulae and one needs to be able to solve questions from first principles rather than imaginative methods.
9. Read each question carefully before you start solving and try to look at the options as some of the questions will require much less work if you use the options.
10. Overall an intelligent test.

Cheers!
Rahul

All The Best

2011-10-21T14:17:00.001+05:30

All the best to all the CAT 2011 aspirants..

Cheers,
Rahul

Problem of the Day 12 Oct 2011

2011-10-12T12:46:00.000+05:30

How many factors of have last digit 2?

Problem of the Day 10 Oct 2011

2011-10-10T12:03:00.001+05:30

Ten identical boxes of dimensions are stacked flat on top of each other, with the orientation of each box being independent and random. If is the probability that the height of the stack is and , find . All units are in feet.

Problem of the Day 9th Oct 2011

2011-10-09T00:30:00.000+05:30

In an increasing Arithmetic Progression, the product of the 5th term and the 6th term is 300. When
the 9th term of this A.P. is divided by the 5th term, the quotient is 5 and the remainder is 4. What is
the first term of the A.P.?
(a) 12 (b) –40 (c) –16 (d) –5

Problem of the day 8th oct 2011

2011-10-08T00:30:00.000+05:30

Rohan is asked to figure out the marks scored by Sunil in three different subjects with the help of
certain clues. He is told that the product of the marks obtained by Sunil is 72 and the sum of the
marks obtained by Sunil is equal to the Rohan’s current age (in completed years). Rohan could not
answer the question with this information. When he was also told that Sunil got the highest marks
in Physics among the three subjects, he immediately answered the question correctly. What is the
sum of the marks scored by Sunil in the two subjects other than Physics?

(a) 6 (b) 8 (c) 10 (d) Cannot be determined

Problem of the day 7th Oct 2011

2011-10-07T11:09:00.000+05:30

Ten books are arranged in a row on a bookshelf. A student has to select three out of these ten books
in such a way that no two books selected by him must have been lying adjacently. In how many
ways can he make the selection?
(a) 56 (b) 64 (c) 72 (d) None of these

Problem of the Day 6th Oct 2011

2011-10-07T11:08:00.000+05:30

If xΔ(y +1) = yΔ(x +1), xΔ x = 1 and (x − y)Δ(x + y) = xΔ y, then what is the value of 1001Δ1?
(a) 1000 (b) 100 (c) 10 (d) 1

Problem of the day 5th Oct 2011

2011-10-05T09:36:00.000+05:30

The set S contains nine numbers. The mean of the numbers in S is 202. The mean of the five smallest of the numbers in S is 100. The mean of the five largest numbers in S is 300. What is the median of the numbers in S?

Problem of the Day 4th Oct 2011

2011-10-04T00:10:00.001+05:30

Find and , where the variables are natural numbers:

Problem of the Day 3rd Oct 2011

2011-10-03T00:30:00.000+05:30

How many ordered pairs of positive integers satisfy the system

where and denote the greatest common divisor and least common multiple of and , respectively?

(A) 0 (B) 1 (C) 2 (3) More than 2

Problem of The day 2nd Oct 2011

2011-10-02T16:22:00.002+05:30

Let [x] and {x} respectively denote the integer and fractional part of of a real number x. If {n} + {3n}=1.4, find the sum of all possible values of 100{n}.

(A) 180 (B) 145 (C) 85 (d) 102

Problem of the day 1 oct 2011

2011-10-01T00:30:00.000+05:30

In 3-dimensional space, there are 3 rays leaving point . Any pair of 2 rays make a 60 degree angle with each other in their respective planes. Points , , and are situated on the rays (one per ray) such that , , and are all integers, and . if and is odd, then determine the value of if .

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Problem of the day 30 Sept 2011

2011-09-30T00:30:00.000+05:30

What is the largest number in the sequence ?

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Problem of the Day 29 Sept 2011

2011-09-29T00:30:00.000+05:30

Let a, b, c be three distinct odd natural numbers. Which of the following can be the sum of the squares of a, b and c?

(a) 3333 (b) 5555 (c) 9999 (d) 7777

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Problem of the Day 28 Sept 2011

2011-09-28T00:30:00.000+05:30

A good approximation of π is 3.14. Find the least positive integer d such that if the area of a circle with

diameter d is calculated using the approximation 3.14, the error will exceed 1.

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Permutations and Combinations- Free Lecture Notes

2011-09-27T15:57:00.000+05:30

Many of you have emailed about some easy reference for Permutations and Combinations, Number theory etc. I cannot say if it is an easy reference, but it is one concise one.. It is from one of our Professors at IIT Kanpur, Dr A K Lal, great chap, I must say. This is one gem of a compilation. Hope it helps you.. If the material is too tough, just ignore!

http://home.iitk.ac.in/~arlal/book/mth202.pdf

Enjoy!