Remainder Concepts for CAT – How to Find Out Remainder of a Number with Power?

April 15th, 2019 by

Figuring out the last digit is the same as figuring out the remainder of a number when divided by 10, but I guess you already know that. Figuring out the last two digits is the same as figuring out the remainder of a number when divided by 100. However, if you wish to figure the remainder when the divisor is not 10 or 100, I suggest you read on. Funda 1 of Remainders:  Basic idea of remainders can be used to solve complicated problems.     There is nothing special or unique about this idea. At first glance it seems like something really obvious. But it is it

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Mixtures and Alligation Concepts for CAT Exam Preparation

April 11th, 2019 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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Quadratic Equations – Concepts and Questions with Solutions for CAT Exam

April 9th, 2019 by

Quadratic Equations are first taught to us in 6th or 7th class and most of us are able to score good marks in it because we are able to solve 90% of the questions by just using that formula. And that formula is: The above formula gives us the roots of the quadratic equation ax2 + bx + c = 0 For this post, I am assuming that you are aware of the basics of quadratic equations and know how to use the above mentioned formula. In case you are not, spending five minutes on the wiki page of Quadratic Equations won’t hurt. Wikipedia can be daunting at times, so come back here as soon a

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How to Solve Inference Based Questions in Reading Comprehension for CAT?

April 8th, 2019 by

During discussion of a current affair issue with a friend, I found the below couple of excerpts that instigated to think what I understood from the complete issue and how it can be fit on logical ground from the selection itself are though similar but cannot be handled in the same way. It is applicable for all types of reading. And when logic comes into the picture then with it, it brings premise, conclusion, assumption and argument as a whole. Example-1 “US and Pakistan continue to partner on a range of national security issues. President Donald Trump’s administration appears re

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How to Find Number of Trailing Zeros in a Factorial or Product

April 3rd, 2019 by

In this Number of trailing Zeros blog post, We would like to cover these two ideas: Number of trailing zeroes in a Product or Expression Number of trailing zeroes in a factorial (n!) But before I begin, let us first try to understand what exactly are ‘trailing zeroes’. It is nothing else but the number of zeroes at the end. I do not want to sound pedantic but on many occasions when you see a question which asks about, “What is the number of zeroes in ___” it is incorrect, because it should actually say – “What is the number of trailing zeroes?” or “What is the

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Words with Similar Meanings and Subtle Differences

March 31st, 2019 by

In the series on confusing words (Part 1, Part 2 and Part 3) we looked at words that sound similar or look similar but mean different things. There is another class of words you should be careful about - these are words that are often used interchangeably (and wrongly at that, I must add). This generally leads to bad writing than bad comprehension when used. You do not need to look far away for instances of not knowing the difference between these similar sounding words. Just ask any MBA aspirant whether have any preferences for specialization and a lot of them say ‘Marketing’. Just fol

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

March 30th, 2019 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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How to Solve Questions on Seating and Circular Arrangement for CAT Exam

March 28th, 2019 by

Arrangement Problems in Logical Reasoning Section of CAT can be most ambiguous of all the problems. This topic includes variety of different subtopics with multiple variation and integration of them. One such topic in arrangements is Seating (or sitting) Arrangements, which is one of the most important and consistent in CAT. I know Seating Arrangement questions can be confusing, Time-consuming and at times brainstorming questions in Logical Reasoning section. But don’t forget that around 3-4 questions are based on this topic in CAT, so answering them correctly can boost your percentile and

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

March 25th, 2019 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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Basics of Data Interpretation – Approximation

March 23rd, 2019 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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