TTwenty Problem Solving SkillsTwenty Problem Solving Skillsde Jane ChenMateriasProblem solvingMathematics, competitionsEdiciones (1)Twenty Problem Solving Skills (2011)CreateSpace Independent Publishing Platform · ISBN 9781453811559Más obras de Jane ChenTwenty More Problem Solving Skills For Mathcounts CompetitionsMathcounts National Competition Team Round SolutionsFifty Lectures for Mathcounts Competitions