Clocks – Concepts and Questions with Solutions for CAT Exam

May 26th, 2019 by

Questions on clocks (or even calendars) are not really frequent in CAT these days. They used to be really popular few years ago. Having said that, it is always better to understand some of the basic principles and the types of problems that get asked. They might come in handy in case of other exams like CMAT, MAT, SNAP, etc. Clock problems can be broadly classified in two categories: a)      Problems on angles b)      Problems on incorrect clocks Problems on angles Before we actually start solving problems on angles, we need to get couple of basic facts clear: Sp


Permutation and Combination – Distribution of Objects

May 25th, 2019 by

As an astute man Mr. Gump once said, “Life is like a box of chocolates. You never know what you going to get.” The Permutations and Combinations that life presents us daily is baffling and probably it is because of that inherent fear of choices and cases we get intimidated by such questions in the exam. I understand that Permutation and Combination is one of the dreaded topics but I hope that once you understand the fundas given below, your fear will reduce. Permutation and Combination Funda 1: De-arrangement If ‘n’ distinct items are arranged in a row, then the number of way


An introduction to functions (Algebra) for CAT exam

May 24th, 2019 by

Quantitative Aptitude section of CAT has always been proven to be most difficult and challenging especially for all the mathematics haters. Yes, all those who have been running away from Math’s for all these years must now face their biggest fear and there’s no more hiding from it now. Quantitative Aptitude is all about high school elementary math’s, those silly geometry lessons which made no sense then or the Time, Speed and distance problems or Time and work (so confusing).  Also, who can forget the infamous Trigonometry which is still a mystery for most of us? Today in this blog,


How to solve problem on Syllogism in CAT Exam?

May 23rd, 2019 by

Syllogism is an influential concept of CAT. It has its role in logical reasoning and verbal ability section as well. There are approximately 3-4 questions based on it. And these many questions can play vital role in upgrading your percentile. Thus, it’s important that you understand this topic well so that you can score good in the exam. Let’s first understand what does syllogism mean and then I will tell you some useful techniques that will make solving questions on this topic a facile job for you. Syllogism is a Greek synonym of the word conclusion or inference. A more proper defi


Simple Interest and Compound Interest – Basic Concepts and Tricks for solving CAT Questions

May 22nd, 2019 by

Interest rates are very powerful and intriguing mathematical concepts. Our banking and finance sector revolves around these interest rates. One minor change in these rates could have tremendous and astonishing impacts over the economy. But why? Before determining the reason of this why? Let’s first know what is interest and these interest rates? Interest is the amount charged by the lender from the borrower on the principal loan sum. It is basically the cost of renting money. And, the rate at which interest is charged on the principal sum is known as the interest rate. The rate at wh


Permutation and Combination – Distribution of identical object

May 21st, 2019 by

Distribution of identical object is quite wide and important topic in permutation and combination. While distributing identical object it does not matter which object is given to which person, what matter that how many objects are given to any person. Let us take a basic example to understand the concept of this topic let us assume we have to distribute five identical apples between two students such that a student can get any number of apples. If we give zero apple to first student second student will get all the five apples and if we give one apple to first student then other student


Permutation and Combination – Division and Distribution of distinct objects

May 18th, 2019 by

Division and distribution is an important topic in permutation and combination. In this topic we learn how to divide the objects in groups or how to distribute these objects between different persons. This topic contains lots of categories. First category is we have to look which type of object we have to distribute either identical or distinct. Here we will discuss the concept of distribution of distinct objects later in second article we will discuss distribution of identical object. Let’s start to understand this concept with various examples. Division of distinct object in various g


Factor Theory – How to solve CAT questions related to numbers and their factors

May 17th, 2019 by

NUMBER OF FACTORS OF A NUMBER If N is a composite number such that N =ap ,bq ,cr … where a, b, c are prime factors of N and p,q,r ….. are positive integers, the number of factors of N is given by the expression  (p+1) (q+1)(r+1). For example: 140 = 22 x 51 x 71 Hence, 140 has (2+1)(1+1)(1+1), i.e., 12 factors. The basic principle is simple, every number has certain number of factors. You can find manually for the small numbers but for the large ones there is a need of a mathematical formula. The formula is easy to learn, but you should know the basic concept behind this i.


How to Solve Number of Integral Solutions Questions for CAT Exam

May 16th, 2019 by

Equation type: Ax + By = C Few rules to find integral solutions of this type of equations. First, reduce the equation in lowest reducible form. After reducing, if coefficients of x and y still have a common factor, the equation will have no solutions. If x and y are co-prime in the lowest reducible form, find any one integral solution. The rest of the solutions can be derived from that integral solution. For each successive integral solutions of the equation, the value x and y will change by a coefficient of the other variable .If the equation is of the type Ax - By=C (


How to solve Questions on Relative Efficiencies in Time and Work for CAT

May 15th, 2019 by

Work and men are directly proportional to each other, i.e. if the work increases the number of men required increases to complete the work in the same number of days and vice versa. Men and days are inversely proportional, i.e., if the number of men increases, the number of days required to complete the same work decreases and vice versa. Work and days are directly proportional i.e., if the work increases, then number of days required also increases if the work is to be completed with the same number of men and vice versa. The concept of MANDAYS is very important and useful here.