ACKNOWLEDGEMENTS
We would like to thank the following math contests for their problems used in this book:
The Mathcounts Competitions, the nation's premier middle school math enrichment, coaching, and competition program.
The AMC 8, a 25 question, 40 minute multiple choice examination in middle school mathematics designed to promote the development and enhancement of problem solving skills.
The AIME (American Invitational Mathematics Examination), an intermediate examination between the AMC 10 or AMC 12 and the USAMO.
The China Middle School Math Competition.
We would like to thank hundreds of families who participated in the “50 Mathcounts Lectures 2011 Summer Program.†Without their support and trust, this program would not be possible. Thanks go to these parents and students who reviewed the draft of the lectures, made corrections to some errors, and provided excellent insights to some solutions.
