August 14th, 2019 by Ravi Handa

It can be argued that Quantitative Aptitude is the section that makes the most amount of difference in the CAT results every year. If you look at the data from the past few years, you would realize that the Logical Reasoning and Data Interpretation section has remained the toughest section. You normally need to do only 9 questions in it to score a 90%ile. Verbal Ability and Reading Comprehension has remained the easiest section over the years where you have needed to score around 16-18 questions to get a 90 %ile. Quantitative Aptitude, on the other hand, varies a lot. You would need around

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Posted in CAT, MBA, Quant Funda

July 31st, 2019 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

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Posted in CAT, Ebooks, Quant Funda

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

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Posted in CAT, Quant Funda, Solved Examples

March 10th, 2015 by Ravi Handa

Number System
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 like Time, Speed, and Dista

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Posted in CAT, Quant Funda

February 16th, 2013 by Ravi Handa

Basics of functions and modifications of graphs
XAT’s Quant is always a little bit on the tougher side. It is said that the paper would be do-able and the level of difficulty will see a dip. That does not mean that the difficulty level would suddenly drop to the standard of elementary mathematics. XAT traditionally focuses more on topics like functions, probability, permutation & combination, etc. more than the CAT exam. In this post we will discuss some basic tips about functions and how graphs of functions change.
Let us see what the function y = f(x) = x3 + 7 looks like:

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Posted in Bank PO, CAT, MBA, Quant Funda

February 15th, 2013 by Ravi Handa

REMAINDERS ADVANCED
In previous posts, we have already discussed how to find out the last two digits and basic ideas of remainders. However, there are theorems by Euler, Fermat & Wilson that make calculation of remainders easier. Let’s have a look at them.
Funda 1 – Euler:
A very common mistake that students tend to make while using Euler’s Theorem in solving questions is that they forget M and N have to be co-prime to each other. There is another set of students (like me in college) who don’t even understand what to do with the theorem or

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Posted in Bank PO, CAT, MBA, Quant Funda

February 15th, 2013 by Ravi Handa

Basic Applications of Remainder Theorem
In my previous post, we discussed the cyclical nature of the remainders when an is divided by d. In this post, we will see how problems on finding out the remainder can be broken down into smaller parts.
Funda 1: Remainder of a sum when it is being divided is going to be the same as the sum of the individual remainders.
Let us look at an example for this case:
Eg: Find out the remainder when (79+80+81) is divided by 7.
If we add it up first, we get the sum as 240 and the remainder as 2 as shown bel

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Posted in Bank PO, CAT, MBA, Quant Funda

January 25th, 2013 by Ravisankar Vemuri

Sara has just joined Facebook. She has 5 friends. Each of her five friends has twenty five friends. It is found that at least two of Sara’s friends are connected with each other. On her birthday, Sara decides to invite her friends and the friends of her friends. How many people did she invite for her birthday party?
(A) ≥ 105 (B) ≤ 123 (C) ≥ 125 (D) ≥ 100 and ≤ 125 (E) ≥ 105 and ≤ 123
Solution:
The key point:
“Each of Sara’s 5 friends has twenty five friends” => Sara is one among these 25 friends.

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Posted in Quant Funda, Solved Examples, XAT