Project Lib.

Senior problems from recent mathematical competitons are exceptional. They use many ideas that can be used again while they give you intuition to choose the right one. That’s why in the preparation of a Junior he needs to pass through this type of problems as well. In this list you won’t see that insane problems proposed as the last problem on a competition. Here there are problems that use exactly the main techniques for Juniors, but they are most of the times harder than the ones proposed to say, JBMO. By the way, any of these problems can appear as the hard problem on a hard TST. The main feature is that the problems are already selected, and a Junior doesn’t need to do this, because when you try to, it happens or to think one hour on a problem and when you search for a hint you find that the problem is not your level, it uses Senior techniques (this is the “inappropriate” type), or to think the…