Ed Barbeau

Office: Bahen Centre/BA 6176 Email: barbeau@math.toronto.edu Phone: (416) 653-1961

Ed Barbeau is professor emeritus of mathematics at the University of Toronto.

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Talks, articles, compilations

• The Matching Game
• Intuition and Rigour
• Proof in Mathematics (with G. Hanna)
• Problems for school students and their parents (OAME 2007)
• Classic puzzles old and new
• Mathematics in a deck of cards
• A collection of interesting patterns
• A Grade 4 investigation: Outfits
• Egerton Ryerson on mathematics instruction in the schools

Aftermath columns in the Frontenac News

• Crossing the River (July 25, 2013)
• Life's Big Questions {August 15, 2013)
• Neat games for two people (August 22. 2013)
• The number 142857 (September 5, 2013)
• Some birthday surprises {September 19, 2013)
• The convenience store (October 17. 2013)
• Convenience store revisited (October 31, 2013)
• Frog jump {November 21, 2013)
• Pythagorean triples (December 5. 2013)
• A magic square (December 19, 2013)
• The richness of mathematics (January 9, 2014)
• Divisibility (January 23, 2014)
• The problem of the four points (February 5, 2014)
• Matchmaking (February 27, 2014)
• Red and green hats (March 20, 2014)
• Challenge with digits (March 27, May 1, May 8, 2014)
• The birthday cake (April 10, 2014)
• The problem of the large number (May 22, 2014)
• A pair of geometry problems (June 5, June 19, 2014)
• The ace rises to the top (July 3, 2014)
• The art of sitting and standing (July 17, 2014)
• The ratchet (July 31, 2014)
• The beer mug theorem (August 14, 2014)
• The beer mug theorem: diagram (August 14, 2014)
• The arithmetic games (August 21, 2014)
• The rotating table (September 18, 2014)
• A problem for this year (October 9, 2014)
• Summing cubes (October 16, 2014)
• The journey of Ardeth and Charlotte (November 6, 2014
• Billiard balls (November 27, 2014)
• Noughts and crosses (December 4, 2014)
• Jack, the hunter (December 18, 2014; January 8, 2015)
• Counting the zeros (January 15, 2015)
• The ten number surprise (January 29, 2015)
• The four colour theorem (February 12, 2015)
• Extra-sensory perception (February 26, 2015)
• A game for two (March 12, 2015)
• Dodecabus (March 26, 2015)
• The turnaround (April 9, 2015)
• Reproducing squares (April 30, 2015)
• Confidence in mathematics (May 14, 2015)
• Horses and Egyptian fractions (June 4, 2015)
• Homer Simpson and Fermat's Last Theorem (June 25, 2015)
• GIMPS and the prime from hell (July 9, 2015)
• Two problems about numbers (July 23, 2015)
• The Alabama paradox (August 6, 2015)
• Knights and knaves (August 27, 2015)
• Rule of Eleven (September 17, 2015)
• Matt. 20:1-16 slightly revised (October 1, 2015)
• It makes no difference (October 29, 2015)
• Lines through points (November 12, 2015)
• Running it backwards (December 3, 2015)
• More digit puzzles (December 17, 2015)
• Palindromic products and some digital solutions (January 14, 2016)
• The last three holiday problems (January 21, 2016)
• In my estimation (February 11, 2016)
• Don't be confounded by compounding (February 25, 2016)
• An organized shuffle (March 17, 2016)
• A sequence of squares (April 28, 2016)
• The last ones standing (May 26, 2016)
• Cuckoo clock (June 2, 2016)
• Bridge on the River Tay (June 9, 2016)
• A microworld series (June 23, 2016)
• Cribbage (July 14, 2016)

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  Links for elementary teachers

  • Books for elementary pupils
  • Exercises on arithmetic
  • Exercises on ratio and proportion (percentages, rates)
  • Exercises on patterns
  • Exercises on combinatorics
  • Exercises on geometry
  • Mathematics in a deck of cards
  • International Mathematical Talent Search

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