Morgan Stanley Quantitative Analyst interview questions

I received an email requesting my availability for a phone interview and that the interview would consist of math/finance problems or brainteasers and would take 30-45 mins. Once i sent my availability a time was fixed and an HR from MS called me .

Applied online through campus career center... have to sit for two phone interviews, and then if lucky go on-site, need to meet 7-8 people in total, this is a internship position.