Fall 2006 Schedule
Sundays 1:002:00 Cupples I Room 199  

Date  Speaker  Title 
September 10  Prof Victor Wickerhauser  The Pigeonhole Principle 
September 17  Ben Braun  Pick's Theorem 
September 24  Brian Maurizi  Mobius Bands 
October 1  Lisa Kuehne  Divergent Series 
October 8  Jeff Blanchard  The Orchard Problem 
October 15  Greg Knese  Euler's formula and the five Platonic solids 
October 22  Prof Bob McDowell  Liars and Truthtellers 
October 29  Scott Cook  Graph Theory 
November 5  Prof Al Baernstein  Probability and coin tossing 
November 12  Michael Deutsch  Primes 
Spring 2007 Schedule Sundays 1:002:00 Cupples I Room 199  

Date  Speaker  Title 
January 21  Blake Thornton  Triangle disections 
January 28  Aaron Wiechmann  Knots 
February 4  Prof Ann Podleski  Brick Wall Patterns 
February 11  Robert Houska  Fibonacci sequence 
February 18  Xiao Huang  Probability 
February 25  Paul Koester  Ramsey Theorey 
March 4  Emily Ronshausen  Graph Theory 
March 11  No meeting, spring break  
March 18  No meeting, spring break  
March 25  Prof. Larry Conlon  Euler Characteristic of Surfaces 
April 1  Michael Buchenholz  Infinite Series 
April 8  No meeting  
April 15  Prof Al Baernstein  Gambling With Dice 
April 22  Gier Arne Hjelle  Chaos: Searching for Chaos, figures used 
Date  Speaker  Title 

September 30  Blake Thornton  Modular Arithmetic and Doomsday 
October 7  Brian Maurizi  Slide Rules 
October 14  Andy Womack  The Amazing Theory of Morley 
October 21  Blake Thornton  Rational Tangles 
October 28  Joe Bohanon  Large Numbers 
November 4  Brad Henry  The Shape of Space Torus Games 
November 11  Scott Cook  Cryptographs 
November 18  Chris Niemann  The Octonion Slide Rule 
November 25  No Circle (Thanksgiving)  
December 2  Geir Arne Hjelle  Matchbox Computers 
December 9  Richard Lodholz  Zomes! 
Date  Speaker  Title  Snack Parent 

January 20  Eugenio Hernandez  Coloring Pascal's Triangle  Blake Thornton 
January 27  Michael Deutsch  Coloring Maps  S. Beard 
February 3  Blake Thornton  Problem Solving Methods  B. Robinson 
February 10  Scott Cook  How to win at games  N Taylor 
February 17  Andy Womack  Euclidean and NonEuclidean Geometries  J. Downey 
February 24  Brad Henry  The Difficult Task of Ensuring Fair Elections  Holland 
March 2  Blake Thornton  Mathemagical Card Tricks  B Jeffries 
March 9  No meeting, spring break  
March 16  No meeting, spring break  
March 23  No meeting, spring break  
March 30  Lisa Kuehne  RepTiles  K Chung 
April 6  Geir Arne Hjelle  Fractals  T. Song 
April 13  Tim Lott  Topological tomfoolery: math party tricks  N. Hong 
April 20  Rob Houska  Game Theory  S. Hanly 
Joint Circle  Middle School Circle  High School Circle 
Date  Age Group  Speaker  Title  Snack Person  Circle Mentors 

September 21  All  Blake Thornton  Platonic solids (and more)  Blake Thornton  Alex, Leon, Hassan, Tanisa 
September 28  Middle School  Brad Henry  How to play (and win) Connect 4  Penny  Hassan, Jon, Tanisa 
October 5  High School  Victor Wickerhauser  The Pigeonhole Principle  Grant Bowes  Hassan, Jon, Leon, Tanisa 
October 12  Middle School  Andy Womack  Rigid Motions  Eudora  Alex, Hassan, Tanisa 
October 19  High School  Scott Cook  Monty Hall  Shanta  Hassan, Jon, Leon, Tanisa 
October 26  Middle School  Joe Bohanon  Rubik's Cube  David Leib  Hassan, Leon, Tanisa 
November 2  High School  Rob Houska  Games of Chance  Ryan Seo  Hassan, Jon, Leon, Tanisa 
November 9  Middle School  Josh Brady  Geometrical Centers  Olga Malkova  Alex, Jon, Tanisa 
November 16  High School  Jeff Langford  Mathematics Card Tricks  Brett  Hassan, Jon, Leon 
November 23  All  Michael Deutsch  Liars and Truth Tellers  Urmila Panthi/Cathy Krucylak  Alex, Hassan, Jon, Leon, Tanisa 
Joint Circle  Middle School Circle  High School Circle 
Date  Age Group  Speaker  Title  Snack Person  Circle Mentors 

January 11  All  Tim Lott  Blake Thornton  Jon, Leon, Tanisa  
January 18  High School  Russ Woodroofe  Graphs  Appi Sharma  Hassan, Leon 
January 25  Middle School  Jim Gill  Randomness: What should we expect?  Eudora  Jon, Hassan 
February 1  High School  Emily Ronshausen  Mathematical Games  Brett Downey  Hassan, Tanisa 
February 8  Middle School  Michael Deutsch  Polygons and Polyhedra  Bill Jeffreies  Jon, Leon 
February 15  High School  Josh Brady  Vector Races  Charlie  Jon, Tanisa, Leon 
February 22  Middle School  Geir Arne Hjelle  Conway's Game of Life  Grant Bowes  Hassan, Leon 
March 1  High School  Jonathan Browder  How to Count!  Tally  Jon, Tanisa 
March 8  Spring Break  
March 15  Spring break  
March 22  Spring break  
March 29  Middle School  Andy Womack  Clock Arithmetic  Bambi Robinson  Jon, Hassan 
April 5  High School  Jeff Langford  Pick's Theorem  Amy Swartman  Hassan, Tanisa 
April 12  Middle School  Jon Swensen  Checkerboard Problems  Olga Malkova  Leon, Tanisa 
April 19  All  Baili Min  Chinese Remainder Theorem  G Bowes  Jon, Hassan, Leon, Tanisa 
Date  Time  Location  Students Currently Enrolled  Enrollment Deadline 

Friday, June 19  10:00AM2:00PM  Cupples I Room 199  12  June 1 
Friday, July 24  9:00AM1:00PM  Cupples I Room 199  11  July 1 
Washington University in St. Louis Mathematics Department is pleased to announce our Summer 2009 Math Circle. The Math Circle will give you a chance to continue having fun while exploring mathematics. Bring your friends and be sure to sign up early!
You can sign up for one or both sessions.
In order to run these summer sessions we need at least 10 students enrolled.
To sign up, send an email to
While these summer sessions are offered at no cost,
there are associated expenses
and we are dependent upon your kind contributions.
We suggest a donation of between $25$50 per student per session.
This will cover lunch, honorariums to our mentors,
prizes for the students and other expenses.
Information about donations can be found at our
Here are some of the activities we will do during these summer sessions:
We will post a set of problems online, usually about a week before the session, and you, the students, try to solve as many problems as you can at home. Then, at the session you can present your partial or complete solutions, ask questions, etc. You will be talking to math teachers who can follow your thinking and make suggestions about how to improve your presentation. You will be getting as much help as you want, as well as having the experience of explaining your ideas to others. If you can't solve some (or any) of the problems, we will be there to help. Similarly, if you solve all of the problems, we'll have more problems waiting for you at the circle meeting. A Russianstyle circle is designed to help you learn to present your ideas and to learn some mathematics, too. Nobody is expected to solve all of the problems; just do your best, come to the meeting, and we'll be there to help!
Math Battle is an exciting twoteam problemsolving competition. This is a competition that unites mathematics, strategy, sports, team spirits and public performance.
Each of two teams receives a list of problems, each worth a number of points. The teams are given a certain amount of time to solve these problems. Then, the teams and the judges gather. The teams take turns challenging the other team to solve the problems and points are awarded by the judges.
A mathematical battle is a fun way for students to work together on mathematics and present solutions. While it is a competition, each student is supported by their team and the fun atmosphere.
Two or more teams of students are given a set of problems. These are not the traditional math problems that can either be solved or not solved. Math Auction problems are more research type problems with an easy partial solution that can be improved to better solutions.
After the students receive the problems, they they have certain amount of time to solve the problems. Then, the auction begins. Each team receives an equal initial supply of "currency". Each problem is put up for bid. The math circle leader declares the total value of the problem. A team that places a winning bid for the problem presents it's solution. The catch is that every auction problem has a partial solution that can be improved. So if another team believes that it has a solution with stronger result for the same problem, the problem is put up for auction again. A next buying team presents it's solution. A problem is put up on auction again and again until no team wants to buy the problem. When this happens, the team with the best result collects the value of the problem. All the other teams loose their bid money. Then, the next problem is put up for auction and so on.
Joint Circle  Middle School Circle  High School Circle 
Date  Age Group  Speaker  Title  Snack Person  Circle Mentors 

September 13  All  Blake Thornton  Nontransitive dice  Blake Thornton  Yoni, Jon, Hassan 
September 20  High School  Andrew Lewis  Nim and the Chocolate Game  Chakvaborty  Hassan, Caitlin 
September 27  Middle School  Kelly Bickel  The Briges of Konigsberg  Downey  Hassan, Caitlin 
October 4  High School  Russ Woodroofe  NonPlatonic Solids  Krucylak  Jon, Hassan 
October 11  Middle School  Joe Lakey  Triangles, squares, polygons and pi  Vo  Jon, Hassan 
October 18  High School  Nic Sedlock  The lion, the llama and the lettuce  Bowes  Yoni 
October 25  Middle School  Arno Van Den Essen  Magic Squares from Sudoku  Jeffries  Caitlin, Yoni 
November 1  High School  Qing Li  Sudoku  Sharma  Yoni, Hassan, Allison 
November 8  Middle School  Kabe Moen  Rockets!  Robiolio  Yoni, Caitlin, Allison 
November 15  High School  Jeff Langford  Mathematical Auction  Srivastava  Yoni, Caitlin, Jon, Allison 
November 22  All  Roya BeheshtiZavareh  Handshakes and piles  Olsen  Yoni, Caitlin, Jon, Hassan 
Joint Circle  Middle School Circle  High School Circle 
Date  Age Group  Speaker  Title  Snack Person  Circle Mentors 

January 24  All  Mike Deutsch  Repeating Decimals  Blake Thornton  Everyone 
January 31  Middle School  Josh Brady  Kenken  Dasha M  Everyone 
February 7  High School  Marina Dombrovskaya  Sodoku and Math  Joan D  Jon, Jenny K, Jinsoo, Ben, ReI 
February 14  Middle School  Sara Gharahbeigi  Geometry of Loci  Bill J  Allison, Jenny L, Thomas, Jenny K, Ben 
February 21  High School  Nic Sedlock  Hexapawn  Eudora  Allison, Andrew, Brian, ReI, Jenny K 
February 28  Middle School  Wei Deng  Lines and Triangles  Demetri C  Jenny L, Andrew, Brian, Jinsoo, Ben 
March 7  Spring Break  
March 14  Spring Break  
March 21  Spring Break  
March 28  Middle School  Qing Li  Math Battle  Katie B  Jon, Andrew, Brian, ReI, Ben 
April 4  High School  Raphiel Murden  Counting the Odds  Charlie B  Jenny L, Thomas, Andrew, Brian, Jinsoo 
April 11  Middle School  Brady Rocks  Code Breaking!  Christopher B  Jon, Allison, Thomas, ReI, Jenny K 
April 18  High School  Jeff Langford  Catalan Numbers  Penny R  Jon, Allison, Jenny L, Thomas, Jinsoo 
April 25  All  Andy Womack  Math Olympiad!  Sangeeta K  Everyone 
Date  Speaker  Title  Snack Person  Circle Mentors 

September 19  Baili Min  Compass and Straightedge  Blake Thornton  All 
September 26  Xiang Tang  Mersenne Primes  K. Vo 
Andrew Y, Jenny K, Jon F 
October 3  Andy Womack  Game of Set  Downey 
Adam A Allison B, Ben R, Mikkel S, ReI C 
October 10  Sara Gharahbeigi  Number Theory  Mingxing 
Allison B, Jenny L, Jon F, Thomas D Francis W 
October 17  SciFest  Math Circle at the Science Center
Not a formal circle, but we will be doing math. We will be in the Science Center in the hall above the dinosaurs from 106 on Saturday and 113 on Sunday. 
N/A  Everyone! 
October 24  Kabe Moen  Celestial calculations  B Wait 
Andrew Y, Brian S, Jenny L, Thomas D 
October 31  John McCarthy  Halloween Ellipses  J. Zhou 
Adam A Ben R, Jenny K, Mikkel S, Thomas D 
November 7  Alvaro Pelayo  Number Theory and Codes  Swansons 
Jenny K, Jenny L, Jon F, ReI C 
November 14  Matt Kerr  CrissCrossApplesauce  Eudora 
Ben R, Brian S, Jon F, Thomas D Francis W 
November 21  Kevin Schlereth  The 18 Point Problem  T Hayes 
Adam A Allison B, Andrew Yu, Jenny K, Mikkel S, ReI C, Francis W 
October 1617 is SciFest 2010 at the St. Louis Science Center. The Washington University Math Circle will be helping out by talking to people about fun mathematics all day (see schedule below). We will be located in the area above the dinosaurs on the 2nd level. Please stop by.
Tentative Schedule  

Day/Time  Mathematician/Topics 
Friday Oct 15, 6:30PM10PM
(No math on Fri evening) 
(Friday Night "Extravaganza")
(NO MATH) Adam Adenwala Ben Roth Julie Zhou 
Saturday Oct 16, 10AM12PM 
Adam Adenwala  ?? Anneke Bart  Escher Ben Roth  Math Card Tricks ReI Chin  Math Card Tricks Francis Wu 
Saturday Oct 16, 12PM2PM 
Josh Brady  ? ReI Chein  Math Card Tricks 
Saturday Oct 16, 2PM4PM 
Kabe Moen Marion Sudvarg Russ Woodroofe 
Saturday Oct 16, 4PM6PM 
Anneke Bart  Escher Kevin Scannel  ?? Mikkel Snyder  ?? Jenny Liu  Paper Polyhedra 
Sunday Oct 17, 11AM1PM 
Allison Brenner  KenKen Anneke Bart  Escher 
Sunday Oct 17, 1PM3PM 
Allison Brenner  KenKen Anneke Bart  Escher Mikkel Snyder  ? 
Date  Speaker  Title  Snack Person  Circle Mentors 

January 30  Wei Deng  Prime Numbers  Robinson Family  Everyone 
February 6  Russ Woodroofe  Graph Coloring  Shelton Family  Allison B, Connie S, Jon F, Thomas D, Dipika M, Brian Soetikno 
February 13  Scott Cook  Eye Color Island  OlsenChung Family  Andrew Y, Ben R, Adam A, Jenny K, Dipika M, 
February 20  Yoni Marshall  Paradoxical Probabilities  Jeffries Family  Jenny L, ReI C, Ben R, Adam A, Francis W, Mary S 
February 27  David Meyer  Code Breaking!  Murdock Family  Andrew Y, Jon F, Thomas D, Ben R, Jenny K, Francis W, Dipika M, 
March 6  Kabe Moen  Tiling the Plane  Qian Family  Connie S, Jon F, Ben R, Adam A, Jenny K, Mary S 
March 13  Spring Break  No Meeting  
March 20  Spring Break  No Meeting  
March 27  Kelly Bickel  Balloon Twisting  Trice Family  Allison B, Julie Z, Brian Soetikno 
April 3  Brady Rocks  Mathematical Auction  Keesey Family  Connie S, Jon F, Adam A, Francis W, Dipika M, 
April 10  Andy Womack  Nim and Friends  Robinson Family  Allison B, Jenny L, ReI C, Jenny K, Julie Z, Francis W, 
April 17  Marina Dombrovskaya  Combinations  Downey Family  Everyone 
Date  Speaker  Title  Snack Person  Circle Mentors 

September 11  Tejas Kalelkar  Knots!  Blake Thornton  Everyone 
September 18  Russ Woodroofe  Non Platonic Solids  Chakraborty Family 

September 25  Jimin Ding  Puzzling Probabilities  Brennan Family 

October 2  Matt Kerr  PAdics!  Ware Family 

October 9  Xiang Tang  Topological Conundrums  Ramachandran Family 

October 16  Vincent Kieftenbeld  Fibonacci and Greatest Common Divisors  Tung Family 

October 23 12:301:30 
SciFest  Math Circle at the Science Center  N/A  (Everyone)

October 30 Room 115 
Qingxia Li  Finite Geometry  Qian Family 

November 6  Josh Brady  Game Theory  Robinson Family 

November 13  Qingyuan Wang  Diophantine Equations  Hayes Family 

November 20  Chao Chang  Counting Piles  Gillette Family 

Date  Speaker  Title  Snacks  Circle Mentors 

January 22  Ben Manning  Games  Blake Thornton  Everyone 
January 29  Kelly Bickel  Haga's Origamics  Gilette Family  Francis W, Chris M, Jenny L, Asriel B 
February 5  Renato Feres  AMazeing Math  Lewis Family  ReI C, Adam A, Nati F, Lynn R, Ryan W 
February 12  Bingyuan Liu  Chinese Remainder Theorem  Qian Family  Mikkel S, Adam A, Jenny K, Nati F, Chris M 
February 19  Chris Cox  Highway Planning for Mathematicians  Shankar Family  ReI C, Jihee K, Nati F, Lynn R, Charlie B 
February 26  Ivan Horozov  Gaussian Integers  Green Family  Jihee K, Nati F, Charlie B, Francis W, Lynn R, Chris M 
March 4  Holly Bernstein  Topological Tricks: How to Confound and Astound Your Friends and Neighbors  Jeffries Family  Allison B, Adam A, Dipika M, Nati F, Jenny L, Asriel B 
March 11  No Meeting: Spring Break  
March 18  No Meeting: Spring Break  
March 25  No Meeting: Spring Break  
April 1  John McCarthy  Tilings  Robinson Family  Allison B, Mikkel S, Jenny K, Dipika M, Jihee K, Jenny L, Ryan W 
April 8  Kyle Sykes  A Mathematician Guards the Art Gallery  Tung Family  Allison B, Mikkel S, Dipika M, Asriel B, Ryan W 
April 15  Steve Krantz  Coloring Maps with 4 Colors  Hahn Family  ReI C, Jenny K, Charlie B, Francis W, Jenny L, Ryan W 
Date  Speaker  Title  Homework  Snacks  Circle Mentors  

September 9  Victor Wickerhauser  Recursing Recusion  Recursion  Blake Thornton  ReI C, Mikkel S, Nati F, Jenny L, Katie S, Jihee K  
September 16  Victor Wickerhauser  Inducting Induction  Recursion  Ware Family  Mikkel S, Chris M, Jenny L, Dipika M, Lynn R  
September 23  Kyle Sykes  Hilberts Wonderful Infinite Hotel  Infinity  Voss Family  ReI C, Mikkel S, Nati F, Andrew Y, Lynn R  
September 30  Vincent Kieftenbeld  Hotel Infinity: Many, many, many, ...., more guests  More Infinity  Raj  Mikkel S, Chris M, Katie S, Andrew Y  
October 7  Matt Kerr  Prime numbers and secret messages  RSA  R. Robinson Family  ReI C, Jenny K, Dipika M, Katie S, Andrew Y, Ryan W  
October 14  Alvaro Pelayo  More Codes!  More Codes!  Green Family  Francis W, Chris M, Jenny L, Katie S, Ryan W  
October 21  Kelly Bickel  Math and Magic I  Jeffries Family  Francis W, Nati F, Jenny L, Ryan W, Lynn R, Jihee K  
October 28  Kelly Bickel  Math and Magic II  ReI C, Jenny K, Francis W, Chris M, Andrew Y  
November 4  Ivan Horozov  Perfect Numbers  Perfect Numbers  Fanegan Family  Mikkel S, Jenny K, Dipika M, Nati F, Katie S, Jihee K  
November 11  Tejas Kalelkar  Graph Theory  Graph Theory  Gillette Family  Jenny K, Francis W, Jenny L, Andrew Y, Ryan W  
November 18  Will Ward  Graph Theory  Robinson Family  Jenny K, Dipika M, Nati F, Chris M, Jihee K 
Date  Speaker  Title  Snacks  Circle Mentors 

January 27  Ivan Horozov  Paper Polytopes!  Blake Thornton  
February 3  Tejas Kalelkar  Mathematical Polyhedron  Green Family  Chris M, XiaoYu W, Charlie B, Ryan W 
February 10  John McCarthy  Fibonacci  Barker Family  Jenny K, Nati F, XiaoYu W, Maya M 
February 17  Xiang Tang  Making 24  Newman Family  Francis W, Nati F, Lynn R, XiaoYu W, Ryan W 
February 24  Steven Krantz  Conundrums and Paradoxes in Probability Theory  Green Family  Mikkel S, Jenny K, Jihee K, Charlie B, Maya M 
March 3  Peter Luthy  Odd Numbers and Odd Sums  Bilderback Family  Mikkel S, Dipika M, Francis W, Nati F, Chris M, Jihee K, 
March 10  No Meeting: Spring Break  
March 17  No Meeting: Spring Break  
March 24  Blake Thornton  Cryptography  Malast Family  Mikkel S, Lynn R, Jihee K, Ryan W, Maya M 
March 31  Lisa Kuehne  Mathematics of Voting  Green Family  Mikkel S, Jenny K, Dipika M, Lynn R, Charlie B 
April 7  Jenny Yeon  Binary Numbers  W Robinson Family  Francis W, Chris M, Jihee K, Maya M 
April 14  Kyle Sykes  Hexaflexagons  T Zhao Family  Jenny K, Dipika M, Nati F, Lynn R, Ryan W 
Date  Speaker  Title  Snacks  Circle Mentors 

September 22  Victor Wickerhauser  Putting Whole Pigeons into Holes  Thornton Family  XiaoYu W, Connie S, Philip B, Tyler E, Ben Z 
September 29  Greg Knese  The King Chicken  Jeffries Family  Dipika M, Lynn R, XiaoYu W, Kevin H, Jason Z, 
October 6  Joey Palmer  Conway's Game of Life  Green Family  Nati F, Lynn R, XiaoYu W, Jason Z, Ben Z 
October 13  Alex Papiu  Nim!  Dawkins Family  Nati F, Chris M, XiaoYu W, Connie S, Will E, 
October 20  Junior Fernandes da Silva  Hat Problems  Sallis Family  Dipika M, Lynn R, Kevin H, Jason Z, Philip B, Will E, 
October 27  Dave Meyer  Math Battle!  Newman Family  Chris M, Kevin H, Will E, Tyler E, Ryan W 
November 3  Ari Stern  How to Color a Map with Two Colors  Cowsik Family  Nati F, Jason Z, Will E, Tyler E, Ryan W 
November 10  Alvaro Pelayo  Divisibility  Srinivasan Family  Connie S, Kevin H, Philip B, Will E, Ryan W 
November 17  Kyle Sykes  The Slide Rule Ruler  Barker Family  Dipika M, Nati F, Chris M, Lynn R, 
November 24  Xiang Tang  Tessellations  Kopff Family  Dipika M, Chris M, Connie S, Philip B, Tyler E, 
Date  Speaker  Title  Snacks  Circle Mentors 

January 26  Ivan Horozov  Gaussian Numbers  Lewis Family  Nati F, Connie S, Jason Z, Ryan W, Ryan K, Fangzhou X, Aditya C, 
February 2  Muxi Li  The Knights Tour  K Bassmett Family  Chris M, Will E, Alvin S, Ryan W, Connie S, Dipika M 
February 9  Matt Kerr  Symmetry!  Coen Family  Connie S, Kevin H, Jason Z, Will E, Fangzhou X Dipika M 
February 16  Wei Wang  Let's Draw It!  Gilette Family  Chris M, Kevin H, Alvin S, Ryan W, Fangzhou X 
February 23  Kyle Sykes and Darren Garbuz  TicTacToe and Glueing Squares  Cowsik Family  Nati F, Jason Z, Will E, Alvin S, Ryan K 
March 2  Kyle Sykes and Darren Garbuz  Checkers on Tori  Green Family  Nati F, Chris M, Connie S, Kevin H, Aditya C, 
March 9  Travis Li  Qian Family  Chris M, Connie S, Kevin H, Alvin S, Aditya C,  
March 16  Math Kangaroo Practice  Newman Family  Jason Z, Will E, Alvin S, Ryan W, Dipika M  
Thursday: March 20 4PM 
Math Kangaroo!  
March 23  No Circle: Spring Break  
March 30  Alvaro Pelayo  Sallis Family  Nati F, Connie S, Jason Z, Ryan W, Ryan K  
April 6  Todd Kuffner and MarieJose Saad  Gurnett Family  Nati F, Kevin H, Jason Z, Will E, Aditya C,  
April 13  Todd Kuffner and MarieJose Saad  Choi Family  Chris M, Will E, Alvin S, Ryan W, Fangzhou X, Ryan K 
Date  Speaker  Title  Snacks  Circle Mentors 

Sept 21  John McCarthy  How to do a lot of adding with little work.  Blake  Jiefu Z, Amy L, Patrick L, Ryan W, 
Sept 28  Greg Knese  Chomp the Graph  K Chen Family  Fangzhou X, Tyler E, Amy L, Patrick L, 
Oct 5  Kyle Sykes  Sprouts  Gurnett Family  Fangzhou X, Carley H, Patrick L, Aditya C, 
Oct 12  Ivan Horozov  Polyhedra and Symmetry Groups  Bender Family  Tyler E, Roman B, Ryan W, Aditya C, Angelica T, 
Oct 19  Chris Cox  Cutting Pancakes, Cake and Cheese  Sallis Family  Nati F, Carley H, Ryan W, Aditya C, 
Oct 26  Travis Li  Modular Clocks  Cowsik Family  Nati F, Jiefu Z, Amy L, Aditya C, 
Nov 2  Xiang Tang  What is like a square  Newman Family  Nati F, Tyler E, Jiefu Z, Claire G, Angelica T, 
Nov 9  Darren Garbuz  Picture Hanging  Lewis Family  Carley H, Claire G, Roman B, Ryan W, Angelica T, 
Nov 16  Adam Weyhaupt  Cubes, Cubes, Cubes  Schindler Family  Tyler E, Jiefu Z, Amy L, Patrick L, Roman B, 
Nov 23  Holly Bernstein  Toplogical Conundrums  Blake  Fangzhou X, Nati F, Carley H, Claire G, Roman B, 
Date  Speaker  Title  Snacks  Circle Mentors 

Jan 25  Blake Thornton  Mathematical Black Holes  Thornton Family  Nati F, Amy L, Angelica T, Will E, Jennifer K, 
Feb 1  Yu Yang  Pascal's Patterns  Bender Family  Nati F, Angelica T, Stella S, Jennifer K, 
Feb 8  Han Gan  Puzzling Paradoxes  Li Family  Amy L, Kevin H, Ryan W, Stella S, Adeshola 
Feb 15  Greg Knese  Coins in Twoland  Nanton Family  Nati F, Kevin H, Ryan W, Jennifer K, Adeshola 
Feb 22  Junior Fernandes da Silva  Graph Coloring  Barker Family  Amy L, Kevin H, Will E, Adeshola 
Mar 1  Paul Salomon  Stars of the Mind's Sky: The Space of Regular Star Polygons  Patra Family  Nati F, Amy L, Will E, Stella S, Adeshola 
Mar 8  Darren Garbuz  Soap Bubbles  Patra Family  Angelica T, Ryan W, Brendan G 
Mar 15  No Meeting. Spring Break  
Mar 22  Nan Lin  Puzzling Probabilities  Cowsik Family  Nati F, Angelica T, Will E, Jennifer K, 
Mar 29  Ivan Horozov  Perfect Numbers  Newman Family  Kevin H, Ryan W, Will E, Stella S, Brendan G 
Apr 5  Gong Cheng  One, two, three, infinity  Berger Family  Angelica T, Kevin H, Ryan W, Stella S, Brendan G 