PIE-PAU *enxm *duxm *texm *kexwrm *pfwm *xnxm *xeptm *ahxwm *nahxwm *dexm
(nxm sounds like engksum , pfwm sounds like fum, with e & u in midst of short and long sound)
Not sure where the Latin 5 quinque (French cinque ~ zank) came from
Not sure where the PAu 10 sa-puluq (Samoan safulu) came from, perhaps inverted from pukul (beat); (one hand can punch (panj = 5 fingers) need 2 hands to clap = 10 fingers)
"Humans are merely aquaterrestuarborealistically derived from a more primitive (in the scientific sense) basal primate" a naturalist might say, though I don't recall having heard it...yet.