For this divisibility test, go over- test for divisibility by 3. This divisibility test is similar to the divisibility test for 3.
So the divisibility test for 9 is-
The sum of digits in the number is divisible by 9.
Have a look –
- The sum of digits 20,493 is
2 + 0 + 4 + 9 + 3 = 18
Number 18 is divisible by 9. Therefore the number 20,493 is divisible by 9.
Let’s verify –
The number 20,493 is completely divisible by 9 with remainder zero.
- The sum of the digits 2645 is
2 + 6 + 4 + 5 = 17
Number 17 is not divisible by 9.
Let’s verify –
∴ 2645 is not divisible by 9.
Go over-
