Question

Using the divisibility test, determine $9999$ is divisible by both $5$ and $10$ or not.

Answer 1

Determining a number is divisible by both $5$ and $10$

We know that a number is divisible by both $5$ and $10$ if a number ends with the digit $\mathbf{0}$

Here, $9999$ ends with $9$ which is not equal to $\mathbf{0}$

So, $9999$ is not divisible by both $5$ and $10$

Hence, $9999$ is not divisible by both $5$ and $10$