This document provides a presentation on notable Indian mathematicians. It introduces mathematics and its origins in ancient Indian literature. Then, it profiles 5 great Indian mathematicians - Aryabhata, Bhaskara, Brahmagupta, Srinivasa Ramanujan, and P.C. Mahalanobis - and highlights their key contributions, such as Aryabhata establishing the number system and approximations of pi, Brahmagupta recognizing zero as a number, and Ramanujan's contributions to analytical number theory despite failing school. It concludes that Indian mathematicians made great advances in arithmetic, algebra, geometry, and calculus that influenced mathematics worldwide.