I know this is old, but what is easy and hard in math is very individual. I found the math in Operations Research easy, but what was hard, for me at least, was converting a problem into one that could be solved by operations research. Usually, Analysis is considered hard. I was really worried about it, but surprisingly, it was a snap for me, and I loved it. I did all the analysis options I could. I did all the Stats options not because I liked it or found it easy, but the professor was such a funny guy I was hooked.