Figures from Figures Doing Arithmetic and Algebra by Geometry

  • John H. Conway
  • Richard K. Guy


We can learn a good deal of arithmetic just by writing the numbers in rows of 1, 2, 3, . . . , as in Figure 2.1. The left-hand column in each section is the list of multiples of the number of entries in each row.


Residue Class Multiplication Table Jigsaw Puzzle Triangular Number Pythagorean Triple 
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© Springer-Verlag New York, Inc. 1996

Authors and Affiliations

  • John H. Conway
  • Richard K. Guy

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