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Friday, December 30, 2011

The Year End Rigmarole

Another year comes to a close . I often wonder over the dichotomy of 'time'.
There are days when I count each hour and minutes and time seems to on a standstill , and then there are months ,years that are over in a jiffy.


Some typical year-end shenanigans:

1)Early morning eye  defying fog .


2)The reluctant bather.I gather there are many others in this breed(me included)
3)The 'Blanket Ban' on cold coffee.
4)The Summer in Australia.Boxing day and New Years Test on 2 Jan




5)Best of the year gone by snippets in newspapers,magazines

6)New Year Resolutions
7) The early morning walks at Old Delhi.

8)The Auto Expo at Pragati Maidan


9)The abominable position that the less fortunate find themselves in




The list goes on ...

Over to 2012.

Tuesday, October 11, 2011

Sentence Correction : Demystified

In this article, I will try to highlight the various types of errors that one may encounter in a sentence correction problem (which may include selecting the correct/incorrect sentences in the exam)
Remember, more often than not, a sentence correction question will present you with a combination of several errors at once. They must all be corrected, and no other errors must be introduced. The following sections deal with the different errors separately, but the example questions may present you with multiple errors. So, be careful!
Here are the most common errors in sentences.
1. Using the wrong word.
2. Singular-Plural pronouns.
3. Modifier errors
4. Parallelism errors
5. Idiomatic errors.
6. Diction errors
7. Punctuation errorsSentence Correction image 4
Let us have a detailed look at them now.

1. Using the wrong word

• Practice vs. Practise
• Affect vs. Effect
• Lay vs. Lie
Practice vs. Practise
These words sound alike and are spelled similarly – they differ only by one letter. They have a variety of meanings (to practise an instrument, a profession; a doctor’s practice etc.) but there is one golden rule:
The word practise with an S is a verb, whereas the word practice with a C is anoun.
For example: I practise the piano (verb), but I did my piano practice (noun). The doctor practised for twenty years (verb), but his brother, the solicitor, had a practice that lasted over thirty years.
Another pair of words that functions exactly the same way is advise (the verb) and advice (the noun).

2. Singular-Plural Errors

Illustrative Sentences
• A picture of the All-Star Team, composed of players from different leagues, were given to each member.(This is incorrect)
Explanation
The trick to catching these errors is to isolate the true subject of a sentence. Remember to use the bracket technique to isolate the distracting phrases so that you can focus on the important elements of each sentence.
In the above example, the subject—picture—is singular, but the verb—were—is plural.
Therefore, this is not a correct sentence. The correct statement would be:
A picture of the All-Star Team, composed of players from different leagues, was given to each member.

3. Modifier Errors:

Modifiers should be close to what they modify. This is the golden rule used for finding modifier errors.
Example: The man saw the house on the hill with the telescope.
So, why is this wrong?
We have two modifiers here, which are phrases that give additional information: on the hill and with the telescope. It isn’t clear from the way in which the sentence has been corrected to what these modifiers refer. We can reasonably assume that the seeing was done with the telescope, since that is what telescopes are for. Probably, the house was on a distant hill, so it seems the scenario on the left is the most likely one. However, it would have been better to put the modifier with the telescope next to the seeing, and the on the hill next to the house:
The man saw with the telescope the house on the hill.
… or better still …
Using the telescope, the man saw the house on the hill.
This makes it abundantly clear that the seeing was done with the telescope, and it is a quite legitimate change to make.
For more on Modifiers, read this article on Modifiers: Misplaced Modifiers and Dangling Modifiers.

4. Parallelism Errors

Parallelism is the comparing or listing of two or more phrases or clauses which should both/all take the same form. Here is an example of two parallel items being compared:
Seeing is believing.
In this case, seeing is being listed alongside believing. They both take the same form, i.e. a verb ending in “-ing” which is being used as a noun (termed a gerund in grammatical text books). The three-word proverb above does not contain any parallelism errors. We could also rewrite the proverb as follows:
To see is to believe.
This time, both verbs are listed as infinitives, “to …” Again, since they are both in the same form, there is no parallelism errors. However, if we wrote the following, it would be wrong:
To see is believing.
Here a gerund is being compared to an infinitive. This is grammatically wrong. The same applies to the following:
Seeing is to believe.

5. Idiom Errors

The idiom errors arise due to incorrect usage of idioms. It is not easy to spot these errors if one hasn’t heard of them before. Go through the various idioms booklets for practice.
Sample this:
• Many teenagers feel a great deal of pressure to conform with the values, attitudes, and behavior of their peers.(Incorrect idiomatic usage).
The correct expression is “conform to”; the preposition “with” is incorrect.

6. Diction Errors

A diction error is using the wrong word for the meaning intended. You have to be very careful to spot this error because the word in the sentence is spelled almost exactly like the word that should have been used.
Example:
• The space launch will take place next month, providing that the weather is good.
The word providing in the example should have been provided. A diction error is not a spelling error, but rather the wrong word.

7. Punctuation errors

Sentence fragments and run-on sentences can be fixed with proper punctuation and by transitional words or phrases.
• Example:
Many students are intimidated by math, they do not realize that solving problems is a lot like following simple recipes.
The error here lies with the comma that appears after the word math.
Why is it an error?
When two halves of a sentence can both stand on their own, a comma is not the correct punctuation. The comma here should be replaced by either a period or a semicolon.
So, replace the comma with a semi colon in the above statement and you are done.
Lets take a look at another common error.
Example 2:
The summer program offered intensive immersion sessions in the following languages, French, German, Spanish, Italian, Russian, Korean, Chinese, Japanese, and even Latin and ancient Greek.
The statement looks just about fine. I can’t find any tense, modifier, parallelism error in it.
The error lies in the incorrect punctuation (read absence of a colon) in the sentence. The error free sentence should be:
The summer program offered intensive immersion sessions in the following languages: French, German, Spanish, Italian, Russian, Korean, Chinese, Japanese, and even Latin and ancient Greek.
Important: A colon is used to introduce specific information discussed earlier in a sentence.
These are few of the major errors that you will encounter in the exam. Solving sentence correction questions from previous year papers is the only panacea for gaining a sufficient level of prowess over it.

Monday, September 12, 2011

Finding remainders using Euler's theorem


This method is very useful when the divisor and dividend are relatively prime numbers...

step 1: To calculate euler's no. of a divisor.

euler's no. can be practically taken as cyclicity in remainders by a divisor..

to find euler's no, express the divisor in terms of prime factors...

100 = 2^2 x 5^2.

powers of the prime nos. have no significance...its jus the prime no. that matters...

euler's no (e for convenience) = divisor x (1-1/first prime factor) x (1-1/second prime factor) x ... (1-1/last prime factor)

so, for 100, e = 100 x (1-1/2) x (1-1/5) = 100 x 1/2 x 4/5

= 40.

that means e for 100 = 40. or, in other words, 100 divisor will definetly show a cylicity of 40 in the remainders.

whenever the power of a relatively prime no. will be a multiple of 40, the expression wud show a remainder 1 with 100.

e.g. 3^120 % 100 = ?

we know e for 100 = 40.
3 n 100 are relatively prime nos.
hence, 3^40 % 100 = 1.

hence 3^120 % 100 = (3^40)^3 % 100 = 1^3 = 1.



7^100 % 45 = ?

45 = 3x3x5

e for 45 = 45 x (1-1/3) x (1-1/5) = 24


hence, 7^24 % 45 = 1

hence, 7^100 % 45 = 1^4 x 7^4 % 45

= 2401 % 45

= 16, the required answer...

Finding remainders using cyclicicty with remainders:

This approach is useful when the divisor is small or at times when it is a factor of 100.

3^327%7 = ?

3^1 % 7 = 3
3^2 % 7 = 2
3^3 % 7 = 6
3^4 % 7 = 4
3^5 % 7 = 4x3 % 7 = 5
3^6 % 7 = 5 x 3 % 7 = 1
3^7 % 7 = 1 x 3 % 7 = 3

remainder 
with first power is same as remainder with 7th power...hence v can say that cyclicity in remainders is 7-1 = 6.

so, 327 % 6 = 3, 

hence, effectively, the remainder is 3^3 % 7 = 6

For Example:
3003^9000%(9*1000)

3003^9000%9 = 0 -----> 9k1

3003^9000%125*8
3^9000%125 = 0 ----> 125a
3^9000%8 = 0 -------> 8b -----------> 1000k2

1000k2 = 9k1 ---> 9000%9000 = 0 
so rem = 0

Tuesday, August 23, 2011

CAT : THE NEW PATTERN


                                                  
                                           SOME OBSERVATIONS


With the new format of CAT launched by IIM’s this past month, students have been forced to alter the way they attempt a paper. In this article I will try highlighting the major changes that the aspirants will have to undergo.

SECTION-1 QA/DI             :                
1)      With 30 questions in 70 minutes, this calculation heavy section will apart from posing problems to those who are weak in Quant; will also trouble people who used to allot greater time to this section from the time left after solving VA in the previous format.
2)      It is not easy to attempt all the questions in QA/DI as it has been found talking to aspirants that they are facing a paucity of time in this section while giving the mocks.
3)      Also, the most important question that arises as how to divide the time among QA and DI.
There is no clarity that QA will feature 20 questions or will QA always be followed by DI?

So, seeing a question and solving it as it comes may not be the best strategy , for you may never know that a easy DI set awaits you after a difficult QA section.
4)       The best way to solve this quagmire is to resort to all sorts of permutations during the mock season. Try different strategies and see which one is working(in terms of time and accuracy)


SECTION-2 VA/LR
1)      Contrary to the earlier section, it is seen that time is being left after solving this section by most people.
2)      Aspirants are submitting the tests before the actual time due to the vast resources available to them (Read:Time).
3)      The most important factor that needs to be then seen is the accuracy .Accuracy could be the deciding factor between a good and a great percentile.
4)      One also should be privy to different types of questions that can be asked in this section:
Critical Reasoning may make an appearance , so also could questions where parajumbles, sentence correction and Fill in the blanks are juxtaposed into 3-4 question sets.


This is the initial view/opinion of most people and it remains to be seen what the actual CAT would look like.




Thursday, August 11, 2011

TO FIND SQUARE OF A 3 DIGIT NUMBER



LET THE NUMBER WHOSE SQUARE IS TO BE CALCULATED BE XYZ.

Sq(XYZ) is calculated like this

STEP 1. Last digit = last digit of SQ (Z)
STEP 2. Second Last Digit = 2*Y*Z +  carryover from STEP 1.
STEP 3. Third Last Digit 2*X*Z+ Sq(Y) +  carryover from STEP 2.
STEP 4. Fourth last digit is 2*X*Y +  carryover from STEP 3.
STEP 5. In the beginning of result will be Sq(X) + any carryover from Step 4.

EXAMPLE:

SQ (421)

STEP 1. Last digit = last digit of SQ (1) =1
STEP 2. Second Last Digit = 2*2*1 + any carryover from STEP 1= 4
STEP 3. Third Last Digit 2*4*1+ Square (2) + any carryover from STEP 2.= 2*4*1 +4= 12
  so 2 would be the third last digit  and 1 carryover
STEP 4. Fourth last digit is 2*4*2 + any carryover (which is 1)  = 16+1=17.
 So 7 and carry over 1.
STEP 5. In the beginning of result will be Sq (4) + any carryover from Step 4.
 So 16+1 =17.

So the result will be  177241.



Hope you enjoyed the concept.

Friday, August 5, 2011

Zeller's Rule



Today, I present before you a rule  that can solve your woes in calendar/dates kind of problems.

 With this technique named after its founder Zeller, you can solve any 'Dates and Calendars' problems.


Zellers rule can be used to find the day on any particular date in the calendar in the history. All you have to know is the formula given below and how to use it.

Zeller's Rule Formula:

F = K + [(13xM - 1)/5] + D + [D/4] + [C/4] - 2C
K = Date => for 25/3/2009, we take 25
In Zellers rule months start from march.
M = Month no. => Starts from March.
March = 1, April = 2, May = 3
Nov. = 9, Dec = 10, Jan = 11
Feb. = 12
D = Last two digits of the year => for 2009 = 09
C = The first two digits of century => for 2009 = 20


Example: 25/03/2009
F = 25 + [{(13 x1)- 1}/5] + 09 + 09/4 + 20/4 - (2 x 20)
= 25 + 12/5 + 09 + 09/4 + 20/4 - 2x20
=25+2+09+2+5-40
[ We will just consider the integral value and ignore the value after decimal]
= 43 - 40 =

Replace the number with the day using the information given below.

1 = Monday
2 = Tuesday
3 = Wednesday
4 = Thursday
5 = Friday
6 = Saturday
7 = Sunday
So it's Wednesday on 25th march, 2009.


If the number is more than 7, divide the no. by 7. The remainder will give you the day.

I hope you will find the above method very useful.


Wednesday, August 3, 2011

Quant Concepts-Square of Numbers

Over the next few weeks , I will be covering some essential quantitative ability concepts which are a must for cracking the QA/DI section of CAT.

Let me start by explaining the concept of calculating squares of numbers.

Say , a number 312

312^2.
Determine the closest power of  100/10 as the case may be which is called the base.
In this case we obtain a base of 300.
represent 312^2 as (300+12)^2. here, deviation=12.
 Now,
 follow the step

ldigit(s) before 0 in base x  (number  + deviation) | deviation^2 where | is a separating  line separating 2 parts of calculation.

 
Remember ,
no. of digits on right side of the imaginary line should be exactly same as the no. of zeros in our base.
 
So, our problem boils down to:


3 x (312 + 12) | 12^2

3x324 | 144

972 | 144

= 97344....1 of 144 carried
.


Another example:

38^2

base 30

3x(38 + 8 ) | 8x8

= 138 | 64

= 1444( as only digit should be on the right side of the imaginary line as base has one zero)
So,the 6 in the imaginary part is added to 138.

Comments are welcome and in case of doubts just leave a comment. I will cover them and other concepts in the next blog.

 

.






Friday, July 29, 2011

IIFT GK SECTION: HOW TO PREPARE


                                                
 As promised in the previous article , I will be trying in this write up to make the aspirants aware of the vast plethora of resources available for mastering the GK section of exams  like IIFT(Indian Institute of Foreign Trade).

The best way for preparing for this section is to be aware of ones surroundings.
Here are a few of the steps that you may employ for the examination:

1)      Subscribe to a general affairs and a business newspaper. Note down the major economic and political stories on a day by day basis. Follow this procedure religiously for the next few months.
2)
2)      For those of you who may not find the time to do the above step(although it is recommended) subscribe to websites like http://www.gktoday.in/ . They come out with daily and monthly snippets of information.
3)      Another useful  link is the : http://www.pagalguy.com/forum/prep-resources/68981-official-gk-thread-mba-entrance.html , where you find useful matter shared by fellow aspirants .
3
4)      Towards the end of October , you will find coaching prep institutes coming out with GK Capsules. They are a must read for all. Last year there was more than a handful questions directly lifted from those capsules.
Eg. In one of the GK questions of last year, the name of the parliament of various countries were mentioned and they were to be matched with the corresponding country names. Those of the test takers who may have gone through the booklets would vividly remember that the name of the Japanese Parliament is Diet.
And there was only one option that was matching the said combination. So, even if someone is not aware of the other options , knowing just one option would have sufficed.

5)      In fact such a technique of eliminating answers by options comes in handy in the GK Section of the paper.
6)      Another useful source of study are the magazines Competition Success Review (CSR) and Pratiyogita  Darpan. All one needs to go through is the major happenings section of these magazines.
7)      Besides, the GK Quest of IMS and Gyan Dhara of Career Launcher are also good for practice.


My suggestion to everybody is to keep noting down the latest economic data, political appointments, foreign guest visits , Merger and Acquisitions as they happen .
Go through them once in a week and 2-3 weeks before the exam date , put in a little more rigorous effort.
That should put your  ship in a safe harbor with regards to this section.
All the Best






Wednesday, July 27, 2011

IITs to CONSIDER CAT SCORES,JMET SCRAPPED ?

                                  
 After  the announcement of the CAT 2011 dates and pattern this week , latest information has emerged that JMET might be scrapped this year. No official information has yet come out regarding the same.



WHAT IS JMET?

JMET or Joint Management Entrance  test is the first step in the process of admission to the TWO YEAR FULL TIME Postgraduate Degree Programmes in Management offered by the IITs. Currently IIT Bombay, IIT Delhi, IIT Kanpur, IIT Kharagpur, IIT Madras, and IIT Roorkee offer Programmes  in Management. 
Only engineers are applicable to this test that was conducted on December 12 last year. It was a three hour test having four sections namely: Quantitative Aptitude, Logical Reasoning, Data Interpretation and Verbal Ability.
One could apply to IIT Madras using the CAT scores for the last few years .

REASONS  FOR SCRAPPING JMET



The reason cited for the scrapping of this test that was the low number of test taking aspirants which were in the range of 30,000 last year. Such a scenario was unviable according to test conducting authorities. This information will be validated most likely by September.
 
WHAT IT MEANS FOR ASPIRANTS

1)     From now on, CAT becomes even more important as besides the IIMs , the gates to the IITs also would pass through the Common Admission Test.
2)     Normalisation could  spoil the chances of a large number of people . Thus , getting into an IIT could become tougher,
3)     Each IIT may desire that a student pay an application fee upfront. This could dent your pockets further.

In fact, IIT Kharagpur has already mentioned on its website that candidate's score in CAT, will be considered for admission to 2012-2014 MBA Programme at VGSOM, IIT Kharagpur.

Here is the link: http://www.som.iitkgp.ernet.in/index.php?option=com_content&view=article&id=84&Itemid=298



So, the gist of the story is pretty simple : Perform doubly well in your CAT slot else the doors to the IIMs and the IITs would be shut in one go.
Keep checking this place for more updates regarding this new development.


Monday, July 25, 2011

IIFT PREPARATION GUIDE :GK-1



With the announcement of the dates of the entrance exam for IIFT MBA(IB) program , the 2011 season begins in earnest for many aspirants.
Let me give the aspirants an insight into the pattern of the paper.

The exam which will be conducted on 27 Nov this year will test a student’s aptitude in four sections:
 I will be covering the General Knowledge section in depth initially.

1)      General Knowledge(GK): Arguably the section that separates IIFT from other exams like CAT,XAT .This section is one of the most important section for getting some quick marks .(ROI is the best for this section provided you know the answer ).
Aspirants are advised to be well versed with the current happenings with special emphasis on:

(a)    International Bodies like WTO,OPEC,NATO,UN (Headquarters, Name of the Secretary Generals, President, Members etc)
(b)   Business News (which includes recent Merger and Acquisitions, Taglines, Brand Ambassadors, CEO’s)
(c)    Information about the major seaports, National Highways, National Wildlife Parks , SEZs are all very important and have found their way to the entrance exam during the last 2-3 years.
(d)   Sports and Technology News: One should be aware of the recent sports happenings amd technological updates.
(e)    Awards and Recognitions: Candidates are expected to be aware of the Nobel Prize, Pulitzer, Booker Prize winners.
(f)    Miscellaneous: I would give an example of this category of question with one from last year’s paper .
Name of the instruments like Actinometer, Rheometer were given and they were to be matched with their use .



IMPORTANT NOTE
The weightage of this section has been the least for the past few years. Last year there were 30 questions with a weightage of 0.4 marks each.
Thus, out of the total 100 marks, 12 marks were reserved for GK. Those good in this section could have obtained 7-8 marks in less than 5 minutes , which is like a gold  mine .

In the next article I will be telling you how to prepare for this section.
And believe me sufficient level of prowess can be achieved for this section in the next three months with diligence from an aspirant.





Wednesday, June 15, 2011

Does CAT identify the right candidate?



The answer is an outright NO.
It is indeed ludicrous to see the way the exam is conducted these days .Apart from worrying about the rc passages  and the di questions one now has to grapple with finding  the correct  day , date, time of the exam. One  should actually try to consult an astrologer to  identify the right 'mahurat' !

All CAT identifies are few select lucky people who burst into the limelight bewildered.They themselves are non plussed as to how did they manage such awesome scores.
I personally know many people who were shocked rather than elated after seeing their scores for the first time.
In fact some slots had hordes of people having outstanding percentiles where the paper was deemed easy.

On a more serious note, most of candidates that are shortlisted now would never get shortlisted had the process been fair and just to all.
My personal experience has shown a candidate with below average vocabulary managing a 99.98 in VA .Upon inquiring as to how did this happen ,he answered it was possible because of the very easy vocab that came in his paper.

How does normalisation work, how are difficult questions bench-marked , how are common questions selected for slots are all a mystery to me.
Moreover the mistakes/errors  in certain questions further ruins the candidate's test taking experience .It was found that numerous slots had mistakes in a number of questions.So, the scales are further turned against you.Good Luck. 

Any candidate with average english and decent logical skills is deemed fit to be a manager.Is that all what a manager should possess.
There are many other tangibles and intangibles involved here which are left untouched by CAT.

The only saving grace for the candidates are the other paper tests where each one is bench-marked against others on a same 'standard' of paper .
Whats the solution to this CAT harakiri :
It is time to have computer adaptive tests such as the ones  followed in GMAT where the correct picture of a candidate would be for all to see.
Also aspects like  candidates critical reasoning , his emotional intelligence need to be tested in some form to judge his suitability.

 No doubt hard work is important but it may not be rewarded immediately seeing the present state of affairs.

Friday, February 11, 2011

Cricket Shenanigans

I start my blog with a hot topic: CWC not to be confused with CWG.
Every four years the 10-12 countries out of 201 in this world await the gala event with bated breath .
Never mind the over the top celebrations and defeats that appear like funerals leaving stone pelting aside.

So after the dull 2007 cup which ended in darkness ( literally ) and another Ozzie( parden me for the error) victory (what was the number my chief stat man No 4) , the question on everyones mind is what will 2011 offer.

here is my humble take:
1)Media going overboard with world cup coverage
2)Spectators getting the accustomed ignore from officials with apathetic experience at the venues.
3) Idolatry and veneration of our team of 15.
4)A couple of scams at least involving players and officials.
5)Ambush marketing and irritant adds making a return .
6)Kenya vs canadda and Ireland vs Netherlands providing humdingers.(Eternal optimist that I am)

But the winner would undoubtedly be the BCCI bosses and their subordinates at ICC(really !) minting money ,what else do you expect?

But ultimately what will make the event a success is the quality and not quantity of 50 over cricket.
It is ODIs last chance of recapturing the halycon years of 80's and 90's.T20 is big enough and take care of itself and others in 2011.
Get set for a joyride with 49 matches in 45 days and if still alive and kicking ,welcome the IPL sans Modi with a new dialysis machine, but thats a story for another day and time
Sayonara