Question

Check the divisibility of $120357$ by $3,4,8$ and $9$.

Answer 1

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

$120357$ is divisible by $3$ as the sum of its digits $1+2+0+3+5+7=18$ which is divisible by $3$.

Divisibility rule of $4$- A number is divisible by $4$ if the number formed by its last two digits i.e. tens and ones is divisible by $4$.

$120357$ is not divisible by $4$ as number formed by last two digits, i.e., $57$ is not divisible by $4$.

Divisibility rule of $8$- A number is divisible by $8$ if the number formed by the last three digits, i,e., hundreds, tens and ones is divisible by $8$.

$120357$ is not divisible by $8$ as $357$ is not divisible by $8$.

Divisibility rule of $9$- A number is divisible by 9 it the sum of its digits is divisible by $9$.

$120357$ is divisible by $9$ as $1+2+0+3+5+7=18$ which is divisible by $9$.