Hardest -
I think the position goes to Mechanical / Chemical/ Electronic engineering. Over here we call them "the trinity of pain" because each one is hard as hell.
In Chemical Engineering you have a lot of memorization, adding that the laws of physiscs and chemistry that are aplied in many research and lab experimets... Hats off to them
Mechanical Engineering is like mastery of applied physiscs: Thermodynamics, Hydrodynamics, fluids, resistance, applied materials.... etc etc etc. My older brother is a Mechanical Enginner and I admire his knowledge.
Electronic Engineering is a pain when you think that 1 second is too much time (infinity). There's quantum physics, modern physics, electromagnetism (optics), multyvectorial math and geometry. I am major in electronic engineering and It was really though. My mother and older syster quit before the 4th semester (over here you study for 5 years)
Easiest
From what I herad and experimented is business. Looks like your studying to develop good common sense in administration, econimics and of course, business. I might be wrong.
