Question

Using divisibility test, determine $12159$ is divisible by $4$ and $8$:

Answer 1

If the last two digits of a whole number are divisible by $4$ , then the entire number is divisible by $4$.
When $59$ is divided by $4$,we get reminder $3$, so $12159$ is divisible by $4$.
If the last three digits of a whole number are divisible by $8$, then the entire number is divisible by $8$
When $159$ is divided by $8$, we get remainder $7$, so $12159$ is divisible by $8$.
Hence, $12159$ is not divisible by $4$ and $8$.