Turn Numlock on at login
From MEPIS Documentation Wiki
If you want NumLock on at KDE startup, simply use the setting in System Settings -> Peripherals -> Keyboard -> NumLock on KDE startup, set it to "Turn on".
If you however want to turn NumLock on by default even before logging in to KDE, in the login dialog itself (this is useful for some laptops that have the numeric keyboard combined with the normal keyboard), do the following:
Start Konsole and run these commands (as root):
apt-get update apt-get install numlockx echo numlockx on >>/etc/kde3/kdm/Xsetup

