While appearing for the competitive exams there is always a need to find the factors of the number. Here we are going to learn how to use the number 9 for the finding the factors of a number. I will explain with example.

a. First the simple one: Suppose we need to find the factor of number 44.

** Step 1**. –

**Multiply the digits before unit place by 9**( In our example we will multiply by 4 x 9 = 36

** Step 2** –

**Then add the unit digit with the digits in front of unit digits (**In our example = 4 + 4 )

** Step 3** – So you will note 44 = ( 4 x 9 ) + (4 + 4)

This will always be true for all the numbers

Lets take the 2nd Example for the 107

** Step 1**. –

**Multiply the digits before unit place by 9**( In our example we will multiply by 10 x 9 = 90 )

** Step 2** –

**Then add the unit digit with the digits in front of unit digits (**In our example = 10 + 7 = 17)

** Step 3** – So you will note 107 = ( 10 x 9 ) + (10 + 7)

Now you practice this concept with few example given over here

**Question- 1**

Find factors of 1236

**Answer- 1**

Multiply 123 x 9 = 1107, then add 123+ 6 = 129 so it can represented as (123 X 9) + (123+9) [/wpspoiler]

**Question- 2**

Find factors of 81

**Answer- 2**

Multiply 8 x 9 = 72 , then add 8 + 1 = 9 so it can represented as (8 X 9) + (8+1) [/wpspoiler]

[ad#Textads-BetPost]