Enabling number keypad in Ubuntu

First, install numlockx
sudo apt-get install numlockx

Then create a script to turn it on.
sudo gedit /etc/init.d/numlockon

Enter these two lines of code to your blank script. Save and close gedit.
#!/bin/bash
numlockx on

Make your script executable
sudo chmod +x /etc/init.d/numlockon

Then type this thing that does something that makes it work..
sudo update-rc.d /etc/init.d/numlockon defaults



Reboot and enjoy having a functioning numpad!