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-**