Learn Mathematics, Teach Mathematics
Aspirants who want to pursue M.Sc - PhD, they can save 1 year time by pursuing integrated M.Sc. - PhD course.
To pursue dual degree courses you need to qualify the IIT JAM (Joint Admission Test).
Check the complete selection procedure of iit jam here : IIT JAM Admission Procedure
To Prepare for IIT JAM Exam?
Check the eligibility criteria to apply for IIT JAM here : ELIGIBILITY REQUIREMENTS.pdf
I hope it will help you.