My new book:
"Qmaths! Mathematical Methods for Speed and Accuracy for Malaysian Schools" is almost out, hopefully in February.
I have solely used the Vedas and the Puranas to show the mathematical methodology, using the works of the Shankaracharya himself, Jagadguru Sri Bharati Krishna Tirtaji. I've also included some of my own formulas which are again based on the Vedas and the Puranas.
I also have a trained group of students (aged 10 to 15) who are math whizzes! A year ago they were just regular students struggling with numbers. Now they have super powers! :) Soon I shall be taking them on a nation wide tour.