A number is divisible by 9, if the sum of the digits in the number is divisible by 9 or multiple of 9.
Example 1 :
Check whether 9477 is divisible by 8.
Solution :
Add all the digits in the number 9477.
9 + 4 + 7 + 7 = 27
The sum of the digits in the given number 9477 is 27 which is a divisible by 9.
So, 9477 is divisible by 9.
Example 2 :
Check whether 12708 is divisible by 9.
Solution :
Add all the digits in the number 12708.
1 + 2 + 7 + 0 + 8 = 18
The sum of the digits in the given number 12708 is 18 which is divisible by 9.
So, 12708 is divisible by 9.
Example 3 :
Check whether 3645 is divisible by 9.
Solution :
Add all the digits in the number 3645.
3 + 6 + 4 + 5 = 18
The sum of the digits in the given number 3645 is 18 which is a multiple of 9.
So, 3645 is divisible by 9.
Example 4 :
Check whether 948 is divisible by 9.
Solution :
Add all the digits in the number 948.
9 + 4 + 8 = 21
The sum of the digits in the given number 948 is 21 which is not divisible by 9.
So, 948 is not divisible by 9.
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