Question

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

• A. $3$
• B. $4$
• C. $6$
• D. $9$

Answer 1

The correct option is D $9$

Numbers are divisible by $9$ if the sum of all the individual digits is divisible by $9$.

For example, the last sum of the digits of the number $3627$ is $3+6+2+7=18$, and $18$ is divisible by $9$.

Therefore, $3627$ is divisible by $9$.

Hence, a number is divisible by $9$ if the sum of the digits of the number is divisible by $9$.