What might be the reason behind keeping the provision of not exceeding 25 in number ?write a reason​

A provision is not exceeding due to specific date and within period of time. I hope this helps ..

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.