Mixtures and Alligation Concepts for CAT Exam Preparation

May 29th, 2020 by

The questions on Mixtures and Alligations are asked repeatedly in CAT and keeping the past year trends in mind, one or two questions are asked every year. We have seen the concept used in some of the Data Interpretation questions as well, so this cannot be overlooked.  Let us begin with the subject matter on this topic. When we have to find the average of a given set of values, we just add those values and divide by the number of values in consideration.  But what do we do when we have to find the average of 2 given sets of values, each containing different number of elements? We use

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Logical Reasoning Basics – Binary Logic – Liar, Truth Teller, and Alternator

May 24th, 2020 by

In a series of posts, we are going to cover the basics of some DI/LR topics. The first topic of discussion is Binary Logic. In a binary logic problem, we have people who either speak a true statement or a false statement. These people are divided into three categories: Truth-teller: This person will always speak the truth. All the statements made by this person are true. Liar: This person will always tell a lie. All statements made by this person are false. Alternator: This person always alternates between the truth and the lie. If first statement of this person is true, then se

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Tips and Tricks to Solve Para-Jumble Questions for CAT Exam

May 12th, 2020 by

Most of us are lured to attempt Para jumble/sentence completion questions in CAT/Mock CAT. In these type of questions, we eventually, come to down to 2 confusing choices. And the sad story is, most of the time we select the wrong option.But, the irony is it’s hard to leave these type of questions as with added logic these questions can be very scoring and consume less time as compared to an RC. So let me try to spread some gyaan that might be able to help you out in these situations. First ,try to find the purpose behind the para: When the purpose is to explain something – the

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Application of Quantitative Ability Concepts in Logical Reasoning Puzzles and Data Interpretation Sets

May 6th, 2020 by

In the recent CAT papers, we have seen questions in Logical Reasoning and Data Interpretation section based on the concepts from Quantitative Ability. These questions can also be solved with simple logic but if solved with the Quantitative Ability concepts then solving becomes more convenient. Topics such as Mixture-Allegation, Percentages, Linear equations, numbers etc. are used to frame questions. In this post, we will look at some of the Quantitative Ability based applications in this section of CAT. We will not discuss the Quantitative Ability concepts in this post, rather we will impl

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Basics of Data Interpretation – Approximation

May 5th, 2020 by

Data Interpretation questions typically have large amount of data given in the form of tables, pie charts, line graphs or some non-conventional format. The questions are calculation heavy and typically test your approximation abilities. A very large number of these questions check your ability to compare or calculate fractions and percentages. If you sit down to actually calculate the answer, you would end up spending more time than required and most of us can't afford to lose precious time during competitive exams like CAT, XAT, IIFT etc.  Here are few ideas that you can use for approxim

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Factorial Concepts for CAT – Rightmost digit, Ending Zeroes, Power of a Prime

April 29th, 2020 by

We all know what factorials (n!) are. They look friendly and helpful but looks can be deceiving, as many quant problems have taught us. Probably it is because that Factorials are simple looking creatures, most students prefer attempting questions based on them rather than on Permutation & Combination or Probability. I will cover P&C and Probability at a later date but in today’s post I would like to discuss some fundas related to factorials, which as a matter of fact form the basis of a large number of P&C and Probability problems.   Some of the factorials that mig

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How to solve Family Tree, Relationships problems based on coded symbols

April 26th, 2020 by

Relationships are an integral part of our life whether between or among living ones. Relationships provide definiteness between two objects or persons. Relationships among people are complicated and confusing especially when you are living in a big joint family with innumerable relatives! Blood Relations is a very important part of reasoning section in competitive exam. Every year questions are asked based on them in aptitude tests and entrance exams such as CAT, XAT, SNAP and Bank exams. One other topic of reasoning section is Coding-Decoding. And in this blog, we will understand and develo

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Logical Reasoning Basics – How to solve coin picking / matchstick related problems?

April 15th, 2020 by

In this post, we will learn how to solve Logical Reasoning Problems based on coins and matchsticks picking puzzles. To understand how exactly these kinds of puzzles look like, let’s start the post with a very simple example. The method to solve the example will give better insight so as to how to approach these puzzles. Two smart players A and B are playing a coin game in which they can pick up 1, 2, 3 or 4 coins. They have 78 coins and the player who picks the last coin will lose the game. A and B play alternately and A plays the first move. How many coins should A pick at first so h

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Divisibility Rules for CAT Quantitative Aptitude Preparation

March 30th, 2020 by

The concept of ‘divide and conquer’, derived from the Latin phrase ‘Divide et impera’, was put into use effectively by everyone from Caesar to Napoleon to The British in India. Even Gaddafi tried using the same but as current events show us – he wasn’t very effective. Dividing rather divisibility rules to be specific can come in really handy at times in solving problems based on Number Systems. The standard rules which nearly all of us are very comfortable with are the ones for 2n and 5n. For these all that one needs to do is look at the last ‘n’ digits of the number. If

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Number System Concepts for CAT – Even Factors, Odd Factors, Sum of Factors

March 26th, 2020 by

let me first list down the topics that I am going to cover in this particular blogpost: Number of factors of a given number Number of even factors or odd factors of a given number Sum of all factors of a given number Sum of all even factors or odd factors of a given number   We know that a number N can be written as a product of its factors as given below   N = ap x bq x cr … Here a,b,c… are prime factors of N & p,q,r … are the powers of the prime factors of N.   In such a case the number of factors of N are given by the formula &

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