I want my numlock to be turned on when I turn on my laptop but my laptop has no option to turn on the numlock in the bios.

I installed numlockx from here and installed it with the command

yum install numlockx-1.2-6.el7.nux.x86_64.rpm

Then I added the line

/bin/numlockx on

to /etc/X11/xinit/xinitrc after the line

#!/bin/sh

Done!