# Quantitative

## Time and Work Concepts for CAT Questions [LCM Method]

Problems based on time and work which are asked in CAT can easily be solved by applying an alternate concept which is the method of LCM. Using LCM method, Time and Work problems which appear in CAT are solved quickly and efficiently. In this article, I will be focusing on the application of this method. …

## Average Speed: Time Speed and Distance

Average speed of an object is defined as the ratio of the total distance covered to the total time taken. Mainly there are two different types of questions based on the concept of average speed. The first type is when a body travels the same distance at different speeds i.e. the distance is constant. And …

## Concept of average and short tricks [Method of Deviation] for CAT Exam

Concept of averages for CAT An average is yet another essential concept for the CAT and other competitive exams. Most of us have a fair understanding of the average or mean. However, the questions from average which appear in competitive exams are tricky and often calculation intensive if we apply the standard approach. In this article, …

## Boats and Streams: Formulas Concepts and Questions for CAT Exam

Boats and Streams is an essential topic for many competitive exams. Many varieties of questions can be framed from this area. We use the fundamental concepts of time speed and distance only to solve elementary questions on Boats and Streams. However, some types of questions are tricky and take lots of time to solve by …

## Profit and Loss: Basic Concepts and Shortcuts for CAT Exam

Profit and loss based problems in CAT can easily be solved by applying the fundamental concepts of percentages. The following basic terms are widely used while solving problems on profit and loss. Hence, a clear understanding of each of these terms is essential. Terminologies in Profit and Loss Cost Price (C.P): The price at which an …

## Pipes and Cisterns Formulas Concepts and Questions for CAT Exam

Pipes and Cisterns basic concepts We employ the same basic concepts of ‘Time and Work’ to solve questions based on pipes and cisterns. However, in some instances in addition to inlet pipes, the question also mentions outlet pipes. A pipe connected to the cistern is called an inlet pipe or an outlet pipe, accordingly as it …

## Application of Binomial Theorem for Finding Integral Solutions

Binomial Theorem The formula by which any positive integral power of a binomial expression can be expanded in the form of a series is known as Binomial Theorem. (x + y)n = nC0 xn + nC1 xn-1 y + nC2 xn-2 y2+ ……………..+ nCn yn e.g:  (a+b)3= 3C0a3 + 3C1a2b+3C2ab2 + 3C3b3 = a3 + 3a2b + 3ab2 +b3 Note The number of terms in the expansion of (x+ y)n is (n + 1) e. one …

## Stars and Bars Method : Permutations and Combinations

Stars and Bars Method is also known as partition rule-based Permutation and Combination problems require a specific formula to get the answers. Various questions based on this concept have appeared in competitive exams Like CAT and other management entrance. In this video, we will learn that formula conceptually so that any variation in the questions, …

## Mensuration Formulas for CAT SSC CGL and Other Exams

Mensuration formulas based questions regularly feature in CAT, SSC CGL and other exams. Being a part of geometry, this topic demands that the aspirant be familiar not only with the different formulas of mensuration but also with the other theorems and concepts of geometry.  However, the questions from mensuration are less difficult that other types of …

## Work Equivalent Concept

Work Equivalent Concept is a based on the universal concept of measuring work in two parameters; Agent who is doing work and the duration the work takes to get completed. Let us understand with the help of an example. Suppose the time taken to complete a task by 4 men all of the equal efficiency …

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