Yongcheng Chen

This is a solution (not problems) book for 2019 Mathcounts School and National Competition Sprint round, Target round, and Team round problems. Please contact [email protected] for suggestions, corrections, or clarifications of the solutions.

This is the tenth book of Math Contest Books Series. The book introduces a powerful problem solving technique - Vieta's Theorem. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME. Second book of Math Contest Books Series: https: //www.amazon.com/Balls-Boxes-Yongcheng-Chen/dp/1540390578 Third book of Math Contest Books Series: https: //www.amazon.com/dp/1540856410

This book can be used by 5th to 8th grade students preparing for Mathcounts School and Chapter Rounds Competitions. This book contains a collection of five sets of practice tests for MATHCOUNTS School competitions, including Sprint and Target rounds. One or more detailed solutions are included for every problem.

Math Competition Books Series (9th book) This book introduces some commonly used skills to draw auxiliary lines in plane geometry problem solving. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME.

Math Competition Books Series -- The AM-GM inequality is a powerful problem-solving tool. This book shows how you can use the AM-GM Inequality to solve a variety of problems, such as geometry, equations, inequalities, and finding the maximum/minimum value.The book can be used by students preparing for math competitions such as Mathcounts, AMC 8/10/12, and AIME (American Invitational Mathematics Examination).Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems. 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

This is the sixth book of Math Contest Books Series. The book introduces the substitution method. The book can be used by students preparing for math competitions such as Mathcounts, AMC 8/10/12, and AIME. Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems. 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

Math Competition Books Series -- This book introduces a powerful problem solving technique - the discriminant method. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME. 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

This is a solution book for 2001 - 2010 Mathcounts National Competition Team Round problems. Jane Chen is the co-author of the book "The Most Challenging MATHCOUNTS(R) Problems Solved"- 2001-2010 National Mathcounts Solutions" officially published by the MATHCOUNTS Foundation.

This is the first book of Math Contest Books Series. The book introduces a powerful problem solving technique - the mass points method. The book can be used by students preparing for math competitions such as Mathcounts, AMC 10/12/AIME.Second book of Math Contest Books Series: https: //www.amazon.com/Balls-Boxes-Yongcheng-Chen/dp/1540390578Third book of Math Contest Books Series: The Area Method https: //www.amazon.com/dp/1540856410 Fourth book of Math Contest Books Series: Problem Solving Using Cauchy's Inequality https: //www.amazon.com/dp/1541000285 Fifth book: the Completing Square Method: https: //www.amazon.com/dp/1542426626 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

This is the third book of Math Contest Books Series. The book introduces the area method for solving geometry problems. The book can be used by students preparing for math competitions such as Mathcounts, AMC 8/10/12, and AIME. Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems. First book of Math Contest Books Series. https: //www.amazon.com/Mass-Points-Method-Yongcheng-Chen/dp/1542458706 Second book of Math Contest Books Series: https: //www.amazon.com/Balls-Boxes-Yongcheng-Chen/dp/1540390578 Fourth book of Math Contest Books Series: Problem Solving Using Cauchy's Inequality https: //www.amazon.com/dp/1541000285 Fifth book: the Completing Square Method: https: //www.amazon.com/dp/1542426626 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

This is the second book of the Math Contest Books Series -- This book introduces the new methods to solve balls and boxes distribution problems. The book can be used by students preparing for math competitions such as Mathcounts, and AMC 8/10/12. Each chapter consists of (1) basic skill and knowledge section with examples, (2) exercise problems, and (3) detailed solutions to all problems. First book of Math Contest Books Series. The Mass Points Method: https: //www.amazon.com/Mass-Points-Method-Yongcheng-Chen/dp/1523265884 Third book of Math Contest Books Series: The Area Method https: //www.amazon.com/dp/1540856410 Fourth book of Math Contest Books Series: Problem Solving Using Cauchy's Inequality https: //www.amazon.com/dp/1541000285 9th book: Problem Solving Using Auxiliary Lineshttps: //www.amazon.com/dp/1975681754 10th book: https: //www.amazon.com/Problem-Solving-Using-Vietas-Theorem/dp/1542800056

Revised 4-18-2018.This book can be used by 6th to 8th grade students preparing for Mathcounts State and National Competitions. This book contains a collection of five sets of practice tests for MATHCOUNTS National competitions, including Sprint and Target rounds. One or more detailed solutions are included for every problem. For 1990-2000 Mathcounts National Team Round solutions: https: //www.amazon.com/dp/1543272304 2000-2010 Mathcounts National Team Round solutions: https: //www.amazon.com/dp/1544764421

This is a solution book for 2011 - 2016 Mathcounts National Competition Sprint and Target round problems. Please note that this book does not contain the problems which are copyrighted by the MATHCOUNTS Foundation. The book is not created by nor endorsed by the MATHCOUNTS Foundation. For 1990-2000 Mathcounts National Team Round solutions: https: //www.amazon.com/dp/1543272304

This book contains the solutions to all the exercise problems in 50 Lectures for Mathcounts (Volume 3). Training class is offered: http: //www.mymathcounts.com/Copied-2014-Summer-Mathcounts-Training-Program.php

This book contains the solutions to all the exercise problems in 50 Lectures for Mathcounts (Volume 2). Training class is offered: http: //www.mymathcounts.com/Copied-2014-Summer-Mathcounts-Training-Program.php