Question

test the following for the divisibility by 3 and 9.( a )145404​

Answer 1

145404/3 = 48468

145404/9 = 16156

So, it is completely divisible by both 3 and 9

Answer 2

The given number is 145404.

Test of divisibility by 3 :

For a number to be divisible by 3 , the sum of all the digits of a number must be a multiple of 3 .

Here ,

1 + 4 + 5 + 4 + 0 + 4 = 18

Since , 18 is a multiple of 3 , therefore it is divisible by 3 .

Test of divisibility by 9 :

For a number to be divisible by 9 , the sum of all the digits of a number must be a multiple of 9 .

Here ,

1 + 4 + 5 + 4 + 0 + 4 = 18

Since 18 is a multiple of 9 , therefore , it is also divisible by 9 .