# Category: QA

## Number System : How to find remainder when multiplication of Numbers is divided by a Number

90 Days to CAT – A free short Course – Schedule  \/ Lets try to find remainder when 16 x 21 is divided by 13. \/ Steps : Write the digits as the number...

## Number System : Divisibility by 4

90 Days to CAT – A free short Course – Schedule  \/ The basic rule for divisibility by 4 is that if the number formed by the last two digits in a number is...

## Number System : Divisibility by 3

90 Days to CAT – A free short Course – Schedule  \/ Method 1 : Take any number Add together each digit in the number. Check if the sum  is divisible by 3. If...

## Number System : Divisibility by 2

90 Days to CAT – A free short Course – Schedule  \/ Take any number and note the last digit in the number, discarding the other digits. Then take that digit while ignoring the...

## Number System : Co-Primes or Relatively Prime

90 Days to CAT – A free short Course – Schedule  \/ So what do we mean by Co-Primes or Relatively Prime Nos. ? A set of numbers which do not have any other...

## Number System : How to find sum and number of even and odd factors of a Number

90 Days to CAT 2015 – Schedule  \/ How to find sum and number of even and odd factors of a Number \/ Earlier in the article “How to find sum and number of...

## Number System : How to find sum and number of factors of a Number

90 Days to CAT – Schedule  \/ How to find sum and number of factors of a Number \/ You might have encountered with such questions in earlier CAT papers or any Test series....

## 90 Days to CAT 2015 – A free short Course

Dreaming of MBA : Its time to Believe in yourself, Shred Myths \/ We decided to start “90 days to CAT”, a kind of free short course where we will be discussing with you...

## [CSAT][CAT] Basic Numeracy – Percentages – Multiplying Factor (Tips &Tricks) – 4

Regaining back from our last post : [CSAT][CAT] Basic Numeracy – Percentages – Base (Tips &Tricks) – 3, now lets learn the concept of Multiplying Factor and how relevant it is in calculations of CAT & UPSC CSAT Prelims...

## [CSAT][CAT] Basic Numeracy – Percentages – Base (Tips &Tricks) – 3

Regaining back from our last post : [CSAT][CAT] Basic Numeracy – Percentages – Concept (Tips & Tricks) – 2, now lets learn the concept of  base of a percentage and how relevant it is in...

## [CSAT][CAT] Basic Numeracy – Percentages – Concept (Tips & Tricks) – 2

Regaining back from our last post : [CSAT][CAT] Basic Numeracy – Percentages (Tips & Tricks) – 1, now lets learn the basic concept behind the percentage and what actually percent is. Percent : A percent...

## [CSAT][CAT] Basic Numeracy – Percentages (Tips & Tricks) – 1

This articles is targeted to both CAT and UPSC Aspirants. Percentages, though a very small and easy topic is asked in various formats in both the exams CAT as well as UPSC Preslims CSAT Paper...

## [CSAT][CAT] How to find maximum positive and negative roots of a polynomial

To find the maximum number of  positive and negative real roots of a polynomial f(x), we should consider Descartes’ rule of signs. This rules does not tell the exact number of positive or negative roots....

## [CAT- QA] Simple Interest – How to solve problems – Shortcuts and Tricks

This portion can help you to solve few easier problems as the questions are relatively easier from simple interest section. So lets 1st check out what is Simple Interest and how it is relevant...

## How to find remainder – 1 – Euler’s theorem

To find the remainder when a number having a big power is divided by another number may seem to be a difficult, probably impossible, task but if you know certain sequential method to solve...

## Graph Modification

Sometimes we come across questions related to graphs modification. These questions may look difficult in the first sight but are really easy to crack if we know some of the fundas. The questions may be...

## Nature and sign of the roots of a quadratic equation

Nature of the Roots As I mentioned earlier in the post “Roots of a quadratic equation” that Discriminant helps in determining the nature of the roots of a quadratic equation ax^2 + bx +...

## Roots of a Quadratic Equation

A quadratic equation is a polynomial equation of the second degree. In other words, a second degree polynomial in x equated to 0, where coefficient of x^2 =/=0 will be a quadratic equation. The general form is ax^2 + bx...

## Squares of numbers from 1 to 30

For making your calculation faster you must remember the squares of  numbers from 1 to 30. Here is a collection of squares which could be easily remembered. Sq. 1 = 1          ...

## Last digit of a product of numbers with power.

Last digit of a product of any number of numbers is equal to last digit of product of last digits of all the numbers. So to find the last digit in this case first...