It's only hard when you don't fully understand some part of it. It becomes easy and enjoyable when you can understand the principles and methods to find solutions. When you can look at a question and see quickly how to work it out, that's best of all, even before you get to the answer. Questions often disguise what is really a simple problem, just to keep you on your toes! Rise above the question and see beyond the words and symbols, if you can.