You think it's easy because you know the answer.
I'll give you a question. It's a very easy question.
1+14=3
5+8=1
1+8=9
5+14=?
If you get the answer to this question, you'll say, "Why did I think this was so difficult?"
All problems are easy when you know how to get to the correct answer.
The problem is difficult if you don't know how to get to the right answer.