I am new to this site. Just one week old today. Don't know if it is any issue to be discussed or not but one question is bothering me. Ain't it a bit weird that geometry and combinatorics both in the same category? It seemed so to me. Shouldn't these two be in separate categories? Suppose I am capable of level 4 in combinatorics but of level 2 in geometry. And suppose altogether they will give me level 3. Will level 3 problems be that much helpful in learning? I suppose not. I think I should get level 4 questions about combinatorics and level 2 questions about geometry. What do you think?