See the following for general pointers. They may not be the exact material you want though. http://www.artofproblemsolving.com/ http://www.artofproblemsolving.

See the following for general pointers. They may not be the exact material you want though. http://www.artofproblemsolving.com/ http://www.artofproblemsolving.com/ http://www.amazon.com/Art-Craft-Problem-Solving/dp/0471135712 http://www.amazon.com/Art-Craft-Problem-Solving/dp/047113571... I wish I had access to people who were really good at problem solving when I was in my pre-university days. The intention is not to really become an ace problem solver, but to give the brain a real good workout.