Abstract Mathematics is the universal language that underlies the structure of intelligence, technology and the nature. This article explores how mathematics operates as a common framework in brainpage learning, artificial intelligence, and the natural world. In human brain, mathematical understanding emerges through pattern recognition, spatial awareness, and motor-based brainpage modulation. In machines, artificial neural networks use mathematical models to mimic cognition, decision-making, and prediction. Meanwhile, nature expresses its phenomena – from planetary motion to biological growth – through geometric, algebraic, and statistical patterns. By examining these three domains, the article reveals how mathematics bridges the gap between biological learning, computational systems and universal laws, positioning it not just as an academic discipline, but as the language of everything. Why Mathematics is the Core Language of Intelligence, Learning and Reality Mathematics is not just...