# Category Archives: Number system

## LEAST COMMON MULTIPLE (LCM)

Least Common Multiple When we write the multiples of any two or more numbers taken together, we find that they have some common multiples. Out of those common multiples the smallest among them will be the least common multiple of … Continue reading

## HIGHEST COMMON FACTOR (HCF)

Highest Common Factor Every number has some factors but if two or more numbers taken together can have one or more common factors. Out of those common factors the greatest among them will be the highest common divisor or highest … Continue reading

## DIVISIBILITY RULES

A divisibility rule is a shorthand way of discovering whether a given number is divisible by a fixed divisor without performing the division, usually by examining its digits.

## CLASSIFICATION OF NUMBERS

Every number can be classified into one or more groups. In mathematics, we classify numbers as being rational or irrational, natural, whole, or integer.Today, we are going to learn about these groups and how can we tell where the number … Continue reading

## CAT quant with Chandra-4

Expressing a Number as a product of two natural numbers And applications This video deals with the basics of finding the number of ways of writing a number as a product of two natural numbers. It explains the difference between … Continue reading

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## Number System Super Questions

Number System Workshop: Attempt all these questions and discussion will be held in class.

## Last Two Digits: (Binomial & Cyclicity)

Cyclicity of last two digits: Nowadays, in some of the competitive MBA entrance examinations, questions have been asked to find out the last two digits of a  numberany power. There are basically three ways to find out the last two … Continue reading

Composite Index:

## Remainders (Part I)

In this chapter, we are going to learn how to find remainders when a number or any expression is divided by a particular divisor. First of all, we should understand one thing that in all the problems related to finding … Continue reading

## Application of Number of Factors (Part II)

Placement of factors: We will learn this theory through examples. Let us take factors of 3-4 different numbers. Factors of 12: 1, 2, 3, 4, 6, 12 (6 factors). Factors of 35: 1, 5, 7, 35 (4 factors). Factors of … Continue reading

## Application of Number of Factors (Part I)

After learning how to find number of factors, now we will see some of its tricky applications. Let us start with the basic funda: If we know a natural number in the factorised form, we can find out the number … Continue reading

## Basics of Number of Factors

We are going to learn how to find number of factors of any natural number and various applications of number of factors. Before starting with the main theory, we should be acquainted with some basic terms like factors, factorisation, prime … Continue reading

## Understanding Indices

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