### Mathematics Class IV

Numbers
The Four Operations
Multiples and Factors
HCF and LCM
Fractions
Decimals
Metric Measures
Time
Money, Profit And Loss
Geometry
Symmetry and Pattern
Perimeter and Area
Data Handling

# Factors

When a number divides another number exactly the divisor is called a factor of the dividend.

Ex- :

1. divides exactly, so is a factor of .
2. divides exactly, so is a factor of .

Properties

1. Every non-zero number has a limited number of factors.
2. is the factor of every number.
3. Every non-zero number is the largest factor of itself.
4. Every non-zero number is either less than or equal to the given number.

Highest common factor (HCF)

the of some given numbers is the largest number that divides each one of them exactly.

Ex- :

Find the of and .

We have :

.
.
Common factors .
.

Prime factorisation

The method of expressing a composite number as the product of prime factors is called prime factorisation.

Ex- :

1. .

2. .
Scroll to Top