Hi
Having found the manual for your laptop here:
http://dlcdnet.asus.com/pub/ASUS/nb/X550CC/E_eManual_X550CC_X550VB_X550VC_VER7926.pdf
I can't say I'm surprised that you couldn't find the key combination to toggle the number pad. The manual says this is on "selected models" so it is not impossible to find that you don't have a number pad. However on the assumption that you do then you need a combination of the shift and number lock / scroll lock, according to page 42 of the manual. The full keyboard layout is shown on page 14.
Hope this is helpful, if so would you please register that with Fixya
Cheers
×