International Journal of Academic Information Systems Research (IJAISR)   Year: 2020 | Volume: 4 | Issue: 12 | Page No.: 7-9 The Concept of Number. The Establishment of the Concept of Natural Number and Zero Usmanov Mahsud Tulkin o'g'li and Saipnazarov Jonibek Muhammadiyevich Abstract: Numbers and actions were not invented by anyone. In ancient times, people needed to know arithmetic, how many sheep there were in the barn, and how many sacks of wheat there were in the barn.