We at **ask-math **believe that educational material should be free for everyone. Please use the content of this website for in-depth understanding of the concepts. Additionally, we have created and posted videos on our youtube.

**We also offer One to One / Group Tutoring sessions / Homework help for Mathematics from Grade 4th to 12th for algebra, geometry, trigonometry, pre-calculus, and calculus for US, UK, Europe, South east Asia and UAE students.**

**Affiliations with Schools & Educational institutions are also welcome.**

Please reach out to us on [email protected] / Whatsapp +919998367796 / Skype id: anitagovilkar.abhijit

We will be happy to post videos as per your requirements also. Do write to us.

Consider a number say 30. This is a composite number. We can write 30 as

30 = 2 x 15. But 15 is also composite number which can be written as

15 = 3 x 5

∴ 30 = 2 x 3 x 5

When we write 30 = 2 x 3 x 5, none of the numbers 2, 3, 5 are composite numbers.

2, 3, and 5 are prime factors of 30.

Thus we can say that 30 = 2 x 3 x 5 is the prime factorisation of 30.

There are two methods to find the factors of the given numbers.

1) Factor tree

2) Prime Factorisation Method

Another method to find the factors of the given number. Here also use the prime numbers. So start with 2 ,3,5,7 according to divisibility of the number. If we start with 2 then complete the division by 2 and then consider the next prime numbers.

Express the following as product of prime factors.

1) 150

150 = 2 x 75

= 2 x 3 x 25

= 2 x 3 x 5 x 5

The prime factors of 150 are 2 x 3 x 5 x 5

2) 732

732 = 2 x 366

= 2 x 2 x 183

= 2 x 2 x 3 x 61

_______________________________________________________________

1) 1331

2) 164

3) 729

4) 180

5) 5000

6) 84

7) 91

8) 105

9) 1000

10) 48

• Prime and Composite Numbers

• Divisibility rules

• Prime factorization

• H.C.F or G.C.F

• L.C.M

• Application on LCM

Number System

Home Page

Russia-Ukraine crisis update - 3rd Mar 2022

The UN General assembly voted at an emergency session to demand an immediate halt to Moscow's attack on Ukraine and withdrawal of Russian troops.

GMAT

GRE

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th grade math

8th grade math

9th grade math

10th grade math

11th grade math

12th grade math

Precalculus

Worksheets

Chapter wise Test

MCQ's

Math Dictionary

Graph Dictionary

Multiplicative tables

Math Teasers

NTSE

Chinese Numbers

CBSE Sample Papers