Sequential output is basically output of a machine which is working on a fixed sequence. We start with an input and following a fixed pattern or sequence machine gives us the final output. In these type of questions, we observe that input output process in different steps and try to find out the pattern and sequence on which the machine is working. Importance from exam point of view – These questions looks dangerous but actually these are scoring questions in exams, it doesn’t take much time in solving. Pattern of questions- In all type of questions, there is a sequence given but sometimes ar ..read more

To start a business there is always a requirement of an adequate amount of money which in business terms called “INVESTMENT” OR “CAPITAL”. It is not necessary that a person always has enough money to start a business. In this case, he tries to get partners who are interested in his business. Two or more people can get together to do business by pooling their resources. The people who have invested money in the partnership are called PARTNERS. While two or more partners would have invested money, it is not necessary that all of them should be involved in the day to day running of the business ..read more

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 its usage that makes ..read more

A pipe is connected to a tank or cistern. It is used to fill or empty the tank; accordingly, it is called an inlet or an outlet. Inlet: A pipe which is connected to fill a tank is known as an inlet. Outlet: A pipe which is connected to empty a tank is known as an outlet. Problems on pipes and cisterns are similar to problems on time and work. In pipes and cistern problems, the amount of work done is the part of the tank of filled or emptied. And, the time taken to do a piece of work is the time take to fill or empty a tank completely or to a desired level. Pipes and Cisterns Points ..read more

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 as you start fe ..read more

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 impleme ..read more

Trigonometry is a broad topic and hence we will cover all the concepts and sample examples in a two part post. In this first part, we would discuss concepts, formulae and some sample examples. In the second part of the post, we are following up with some more examples. Trigonometry is the branch of mathematics that deals with the study of relationships between sides and angles of a triangle. It is derived from Greek word, Tri meaning three and Gon means Angle and Metron means Measure. The ratio of the lengths of two sides of a right angled triangle is called a trigonometric ratio. There are s ..read more

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 b ..read more

Sequence and Series topic of Quantitative Aptitude is one the most engaging and intriguing concept in CAT. Since childhood, we love solving puzzles based on sequence and series. Sequence and series are closely related concepts and possess immense importance. We all have heard about the famous Fibonacci Sequence, also known as Nature’s code. This sequence can be used to model or describe various phenomena in the field of biology, mathematics, nature, art etc. The sequence is 0, 1, 1, 2, 3, 5, 8, 13… so on. As we can see, the next no. in the sequence is the addition of previous two numbers in t ..read more

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 us ..read more