First appeared in www.scroll.in on August 22, 2015. Musicians across cultures have been fascinated by mathematics and numbers.  This is also true of Indian musicians. Practitioners and scholars of Hindustani music have alluded to numbers in various ways. The connection between numbers and mathematics on the one hand and rhythm on the other is an obvious one. From highly evolved conceptual structures like cross-rhythms and mathematically constructed rhythmic phrasing to fit into specific number of matras or time units,