Question

Fill in the blanks :

A number is divisible by … , if sum of its digit is divisible by $3$.

Answer 1

A number is divisible by $3$, if sum of its digit is divisible by $3$.

Ex - : $156$ sum of all digits of $156$ is $1+5+6=12$ which is divisible by $3.$

So, we can say that $156$ is also divisible by $3.$