When did people start using numbers?
Neanderthal pursued a number of advanced tool making activities for a very long time, then interbred with modern humans to produce fertile progeny (definition of same species).
see for example : http://anthrojournal.com/issue/october-2011/article/neanderthal-cognitive-ability-and-technological-development
These kinds of technical activities require planning; and, planning requires numeric competence. Understanding this connection requires thinking and deduction.
Our ancestors were counting when they were still making stone tools and wearing skins rather than spinning and weaving. Our ancestors were counting 150,000 years ago, and possibly 250,000 years ago. The opening paragraphs in many texts on origins of human numeric competence are silly.
Even if you studied anthropology a long, long time ago, Google is your friend.