March 14th, 2018 by Ravi Handa
In this Number of trailing Zeros blog post, I 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 n
October 12th, 2017 by Ravi Handa
Nike caused controversy with its advertising campaign during the 1996 Olympics by using the slogan, "You Don't Win Silver — You Lose Gold." Nike's use of this slogan drew harsh criticism from many former Olympic Silver medallists. In a way, it did undermine the importance of the second position but in Math things are often very different. Figuring out the second last digit is often tougher than figuring out the last digit. It is unlikely but definitely not impossible that in CAT you get a straightforward question that asks you to find out the second last digit of a number (abcpqr). It di
July 17th, 2017 by Ravi Handa
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 P & C is one of the dreaded topics but I hope that once you understand the fundas given below, your fear will reduce.
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Funda 1: De-arrangement
If ‘n’ distinct items are arranged in a row, then the number of ways they c
July 15th, 2017 by Ravi Handa
For this series of articles, I am assuming CAT 2018 would be the first time you would be attempting CAT, which essentially implies that you are not well versed with the basic ideas behind the Quantitative Aptitude portion. In the latter half of the year, I would move to slightly more advanced topics as by then, you would also have moved to the advanced stage of preparation.
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I have often seen students struggle with the topic – ‘Permutation & Combination’. As a matter of fact, I have even seen some faculties shy away from conducting those cl
June 28th, 2017 by Ravi Handa
There are some topics in Quantitative Aptitude, like Permutation & Combination, where you can easily find out the answer and the answer you calculate is there in the options but it turns out to be wrong. And then there are some topics in which you read the question, understand it but cannot even begin solving it. You get stuck at the first step and you have no idea about how to even approach the question. The irritating fact is that you understood the question properly. It happens very frequently with questions on Time Speed & Distance (TSD). I have always been a big advocate of
June 5th, 2017 by Ravi Handa
In the previous post we discussed lines, triangles, parallelograms, trapeziums, polygons etc. Now, we will discuss other expanses of geometry which are vital as, the questions on these topics are asked repeatedly in CAT. Let us look at few of the fundas / formulae on these topics that are often neglected by students and can fetch some crucial marks in the exam.
Funda 1: Angle made by Secants
In both these cases, PA * PB = PC * PD
Funda 2: Common Tangents
Note: The two centers
June 2nd, 2017 by Ravi Handa
I got a lot of feedback via emails and texts that people are looking for a post on geometry. I have been avoiding it for sometime because of two main reasons:
a) It is not one of my strong areas.
b) It takes a lot of time to draw the diagrams that are sometimes required to explain the fundas.
The questions on geometry are the trickiest and consumes the maximum amount of time as compared to the questions on other topics in Quantitative aptitude that is why, I have compiled a list of fundas that you might find helpful in solving CAT level questions. I am splittin
July 15th, 2015 by Ravi Handa
Remainders, as a topic, confuses a lot of students. As a matter of fact, a large percentage of CAT quantitative Aptitude questions and doubts on any public forum (Pagalguy / Quora / Facebook) will be dealing with remainders. This is true for the Course Feed of my online CAT coaching course as well. So, I decided to combine all the various kinds of Remainder related questions and make a single post about it. I hope that if you go through the 50+ questions given in this post, you will never struggle with remainders again.
In case you have any doubts with any of the questions, use the commen
March 24th, 2015 by Ravi Handa
A common type of question that gets asked in CAT is when you are given a maximum function and you are supposed to find out the minimum value of the function. Actually, the concept would remain the same even if you are given a minimum function and you are supposed to find out the maximum value of the function.
To solve such kind of questions, all you need to do is to find out the point of intersection of the individual values. More often than not, that would lead to the answer. Let us look at a question that has appeared in CAT before.
Let g(x) = max (5 − x, x + 2). The smallest possi
March 10th, 2015 by Ravi Handa
Number System Questions for CAT Exam
There is common perception that Number System questions form the most important part of the CAT syllabus and something that cannot be neglected when it comes to CAT Preparation. While I agree with the latter half, I strongly object to the first part. The perception about Number System is such because when you consider all chapters of CAT Syllabus, it IS probably the most important but when you compare it with other categories - it loses its relevance. You have to understand what you are comparing it with. If you are comparing with another chapters li