Question

Is $105$ divisible by $3$?

Answer 1

The divisibility rule of $3$ states that if the sum of the digits of a whole number is a multiple of $3$, then the original number is also divisible by $3$.

The given number is $105$. Here sum of the digits $=1+0+5=6$ which is divisble by $3$.

Hence, $105$ is divisible by $3$.