I have an [**HP K3510 Wireless Keyboard**](http://support.hp.com/us-en/document/c04852491) and it does not appear to have a `**`Num Lock`**` key on it even though it has a number pad area with the numeric characters?

[![enter image description here](https://i.stack.imgur.com/CqFL2.png)](https://i.stack.imgur.com/CqFL2.png)