Question

Fill in the blanks :

A number is divisible by ………. , if the sum of its digits is divisible by $9.$

Answer 1

A number is divisible by $9$ , if the sum of its digits is divisible by $9.$

Ex - :$189$ , sum of digits of $189$ is $1+8+9=18$ which is divisible by $9.$

So, we can say that $189$ is also divisible by $9$.