Question

In the following replace * by the smallest number so that the given number is divisible by the number mentioned:
$84*3$ by$3$.

Answer 1

Divisibility rule of$3$- A number is divisible by $3$ if the sum of its digits is divisible by $3$.

Sum $=8+4+3=15$ which clearly is divisible by $3$.

So, we can add $0$ to $15$ we will get $0+15=15$ which is divisible by $3$.

Therefore, $0$ is the smallest number that can replace $*$ in the given number making it divisible by $3$.