Harold Reiter

Professor of Mathematics
University of North Carolina at Charlotte

Contact Information

Department of Mathematics
University of North Carolina at Charlotte
9201 University City Blvd.
Charlotte, NC 28223-0001
Office: Fretwell 345A
Office Hours for Fall 2006:
Mondays and Wednesday mornings, 8:30-10:30 and by appointment

Telephone: (704)-364-5699 home
(704) 687-4561 office
FAX: (704) 687-6415
Electronic Mail: hbreiter@uncc.edu

Index to this web site:

Math 1120, Business Calculus (Spring 2008, Sections 6 and 8. Section 6 meets at 8am TTh, Fretwell 128 and section 8 meets at 2pm TTh )
My course Introduction to Number Concepts is an online Blackboard-Vista course. Students can access the content material at Number Concepts
The Charlotte Teacher’s Circle began in September 2006.
Registration form for 1960 C. E. Byrd High graduates.
Buy my book The Contest Problem Book VII for $43.95 (MAA Member price. $35.50). You can buy it from the MAA or at The Art of Problem Solving Website
American Mathematics Competitions AMC 8, AMC 10, and AMC 12
Other Current Activities
Mathematical Things to do
Websites of Mathematical Organizations
Websites of Mathematical Interest
Websites with Mathematical Problems
The UNC Charlotte Math Competition
Summer Opportunities for Pre-College Students
Mathematics and other programs for university students
Newspapers and other web sites of general interest
Websites of Philatelic Interest
General Information about me

Other Current Activities

I founded and currently volunteer at meetings of The Charlotte Math Club
I founded and currently volunteer at meetings of The Mecklenburg Math Club
My daughter Ashley Ahlin and I have agreed to co-edit the problems section of The Pi Mu Epsilon journal. Your undergraduate level problems are hereby solicited.

Fall 2004 Problems.
Spring 2005 Problems.
Fall 2005 Problems.
Spring 2006 Problems.
Fall 2006 Problems.
Spring 2007 problems.
Fall 2007 problems.
Spring 2008 problems.
Fall 2008 problems. Deadline for solutions, October 1, 2008

The North Carolina AMC homepage
The UNCC Math Contest.
A paper by Dan Kennedy that pretty well sums up the way I feel about teaching and testing. It appeared recently in Mathematics Teacher
Papers I wrote from August 2000 to August 2001 about teaching and learning. Its mainly intended for Math 1100 students, but also applies to other classes My philosophy of teaching, part 1 and
My philosophy of teaching, part 2
I have recently taught the following courses:

Math 1100, College Algebra (Fall 1999; Spring 2000; Fall 2000; Fall 2001; Fall 2002; Fall 2007 online course )
Math 1102, Introduction to Mathematical Thinking, (Spring 2002; Fall 2006)
Math 1120, Business Calculus (Spring 2002; Spring 2003; Summer 2003; Spring 2004; Summer 2005; Spring 2006; Fall 2006; Spring 2007; Fall 2007; Spring 2008)
Math 1165, Discrete Math (Fall 2002; Spring 2003, Fall 2005; Spring 2007)
Math 1241, Calculus 1 (Spring 2004)
Math 1242, Calculus 2 (Fall 2004, Spring 2005, Fall 2005, Spring 2006)
Math 3166, Combinatorics (Spring 1999)
Math 6105, Problem Solving in Discrete Mathematics Summer Workshop in Discrete Math for CMS Teachers, summers, 2001-2006.
Combinatorial Games, (Summers, 1992, 93, 94, 95, 96, 97, 99) Summer Ventures in Science and Math

I completed my term as past president of the National High School and Two-year College Honor Society (after serving as president for the two years 2001-2003) in July 2004 Mu Alpha Theta. I thoroughly enjoyed representing MAO at the International Science and Engineering Fair ISEF in May 2004. For a picture of me with the 2004 ISEF-MAO Scholarship winner, Andrew "Drew" Matteson of Amarillo, TX, click here
In 2005 I wrote the Autumn Math Challenge, a contest for college in the Midwest. Click here to access the scores and here to access the test. The solutions are here.
In 2006 Arthur Holshouser and I wrote the Autumn Math Challenge, a team contest for undergraduates in the Midwest. Click here to access the scores and the ranking. Click here to access the test. The solutions are here.
The website Johns Hopkins/ CTY webmagazine Cogito recently interviewed me.
You can access my problems published in the Sunday (London) Times Problems
In May 2003, and again in 2005, I was appointed to the Presidential Awards Selection Committee.
In July 2003, I was appointed to the College Board CLEP Mathematics Committee.
In August 2002, I was awarded the Paul Erdos Award by the World Federation of National Mathematics Competitions at its biennial meeting. The WFNMC brings together mathematicians who use mathematical problems and challenges to stimulate learning at the pre-college level. For pictures I took on my August 2002 trip, check Australia Trip
In June 2005, Betty and I took a Grand Circle Cruise of the lower Danube from Constanta, Romania to Budapest, Hungary where we met our daughter and her family. The cruise pictures are at Cruise2005
I completed my second term as a MathCounts question writer and as chair of the QWC in 2003-2004.
I have served on the State (of NC) Contest Committee for many years.
I completed my duties as chair of the AMC 12 (and AMC 10 for 2000) Contest in 1999. See American Math Competitions.
I completed my term as the chair of SAT II Mathematics committee of the Educational Testing Service in August 1999. I have been a 'Reader' for the AP Calculus papers in 1978. To find out more about the College Board and ETS, see their websites. I especially enjoyed the 2004 reading. Click here for two photos taken at the reading in Fort Collins, CO. The whole table of readers and Just me.
I am currently serving on the ETS/College Board CLEP (College-Level Examination Program) Pre-calculus Committee, Sept 2002-present.
In my spare time I like domestic and international travel, jogging, racket sports, staring at Stereograms from Magic Eye. and Optical Illusions. Also, I like playing mathematical games like SET, chess, and bridge.
I presented My Favorite Problems at the 27th annual meeting of the American Mathematical Association for Two-Year Colleges in Toronto, Canada, in November 2001. For a copy of the problems with their solutions, see My Favorite Problems.
I have begun writing a regular column called My Favorite Problems in the Journal Mathematics and Informatics Quarterly.
During the summer of 2000, my daughter and I gave a workshop at Iolani School for MathCounts coaches.
I organized a collection of three minicourses and workshops for the annual NCTM, April 5-7, 2001.
My research papers since 1989.

American Mathematics Competitions

The North Carolina AMC homepage
The American Mathematics Competitions.
For a paper by about the history of the American High School
Mathematics Exam and the new (February, 2000) AMC 10, see
The American High School Mathematics Examination: A 50 year Retrospective.
The following exams were produced by the AHSME committee during the years 1994-2000 of my chairmanship.

My wife Betty and I enjoyed very much our work on the IMO2001 Local Arrangements Committee. See IMO 2001 hosted by the United States July 1 to July 14 in Washington DC and at George Mason University.

Mathematical Things to do

Problems by Nick Hobson.
A great website for learning mathematics and mathematical humor
Interactive Mathematics Miscellany and Puzzles
Natural Math
A great way to learn trigonometry
Jim Propp's SELF-REFERENTIAL APTITUDE TEST
Kevin Brown's great website of mathematical papers MathPages
Daniel Scher's Java Sketchpad Page
John Rausch's website
David Levine's site for Game Theory
Jeff Erickson's Games Website
Combinatorial Game Theory
Websites for Combinatorial Games Combinatorial Games Page
Roger A. McCain's Strategy and Conflict: An Introductory Sketch of Game Theory
Martin J. Osborne's What Is Game Theory?
Does .999...=1?
Can you figure out how this works? Fido Challenge.
Can you figure out how this works? The Mind Reading Crystal Ball.
Websites of Mathematical Organizations
I highly recommend The Art of Problem Solving
The Mathematical Association of America
The American Math Society's E-math
For an index of US Universities University Home Pages
The World Federation of National Mathematics Competitions for mathematicians who use mathematical problems and challenges to stimulate learning at the pre-college level.
NRich from the UK has some great problems for middle and elementary students.
page for undergraduate opportunities.
The North Carolina Council of Teachers of Mathematics NCCTM
The National Council of Teachers of Mathematics NCTM

Websites of Mathematical Interest to Students and Teachers

I highly recommend The Art of Problem Solving including the online courses.
MathPro Press has an incredible index of published problems.
United Kingdom Mathematics Trust
Simon Singh's Website is full of interesting mathematical ideas.
A great site for high school and undergraduate level problems by Nick Hobson.
The High School and Two-year College Honor Society Mu Alpha Theta.
The Mathematics Forum at Swarthmore
At UNC Charlotte, I directed and taught in the program Summer Ventures in Science and Math, a state (of NC) funded four week residential program for high school juniors and seniors.
Mathematics On Stamps, Philamath
Jim Kuzmanovich's Math and Mathematicians on Stamps
The North Carolina SDPI math website and calendar of events
The US Department of Education's list of Math related web sites
The North Carolina School of Science and Mathematics is a two year residential magnet high school for science and mathematics.
Canadian Mathematical Society's KaBoL
Financial Aid Information for college students.
Index to Mathematicians Biographies
Mega Mathematics
Letter to parents of home-schooled kids by Vicky Kaseorg.

Websites with Mathematical Problems

I highly recommend The Art of Problem Solving including the online courses.
Geometry Step by Step from the Land of the Incas by Antonio Gutierrez. This is a lovely award-winning website.
The National High School and Two-year College Honor Society Mu Alpha Theta.

· The UNCC Math Contest. If you have Adobe Acrobat Reader, you can see each of the past seven years contest problems. The entire database of problems is available. See EducAide Software web site.

· Math Competitions Archive is a great network of Olympiad and Putnam problems, maintained by Kiran Kedlaya

· A great site for high school and undergraduate level problems by Nick Hobson.

· Results and Problems from recent International Math Olympiads

· The Virginia Tech Regional Mathematics Contest Competitions Archive has problems and solutions for most of its years of existence.

· Results and Problems from recent South African Mathematics Olympiad

· John Scholes' Problems Website including university problems from the Putnam, IMO, and Eotvos competitions

· You can access my problems published in the Sunday (London) Times Problems

· International Math Talent Search

· Wisconsin Math Talent Search contains problems from the WMTS program.

· Great Plains Math League contains problems from the GPML program.

· For more problem sites see Math contests for high school and pre-high school students below.

Websites with Mathematical Problems for younger problem solvers

· University of Delaware program for students in grades 4 to 8.

· Math Stories for Children

· Word Problems at Francis Xavier University in Canada has a very interesting collection of word problems for grades 5-12.

· International Math Talent Search contains problems from the IMTS program.

· MathCounts for students in grades 7 and 8.

· MathPath for students in grades 6 through 8.

· Math Olympiad for Elementary Schools for students in grades 4-6.

· Brain twisters - interactive tutorial K-12.

· Brain Teasers - grades 3-8.

· Mastery of skills - games - strategy building

· Cyber challenge - daily brains - grades 3-8.

· Hot topics - ex. Math Olympics activities and materials - membership information.

· Problem of the Week - interactive - help pages - all topics.

· "Mudd Math Fun Facts" - enrichment - upper elementary plus.

Websites of Recommended Periodicals for High School and College Students

· New Electronic Mathematics Journal for Undergraduates.

· Pi Mu Epsilon Mathematics Journal for Undergraduates.

· Quantum Magazine A wonderful magazine for high school and college students with an interest in mathematics.

· Imagine Magazine for gifted students is published at Johns Hopkins.

· Furman University's Electronic Journal of Undergraduate Mathematics

· Crux's Mathematical Mayhem

· Mathematics and Informatics Quarterly

Math and Science Competitions for high school and pre-high school students.

· Here's a short introduction to contests around the world.

· American Mathematics Competitions for students in grades 6-12

· MathCounts for students in grades 7 and 8

· Math Olympiad for Elementary Schools for students in grades 4-7

· Tournament of Towns for high school and advanced middle school students. These are gorgeous problems.

· Mandlebrot for high school students

· American Regions Mathematics League for high school students

· USA Math Talent Search for high school students

· The UNCC SuperCompetition, which includes the

· The UNCC Math Contest. The entire database of problems is available. See EducAide Software web site. If you have Adobe Acrobat Reader, you can see each of the past four years contest problems

· Math Science Weekend at the College of Charleston

· The Furman University Math Tournament Website

· The State (of NC) High School Math Contest

· The University of Queensland Math Competitions

· Youngstown State University Problem Solving Sessions

· Western (NC) Runoff Contests at the UNC Asheville

· Wisconsin Mathematical Talent Search

· International Competitions

· HIMCM

· For a great network of Olympiad and Putnam problems, maintained by Kiran Kedlaya Math Competitions Archive

· The State (of NC) Competition Newsletter

· The International Tournament of Towns