magic squares

The call of the primes

surprising patterns, peculiar puzzles, and other marvels of mathematics

2016

Text and illustrations look at the world of mathematics, focusing on primes, the Lucas sequence, square numbers, and other topics.

learning the inverse relationships between addition and subtraction

2004

Examines the unique combinations of numbers that make up magic squares, and describes an ancient magic square and one developed by Benjamin Franklin.

learning the inverse relationships between addition and subtraction

2006

Describes magic squares and the relationship between addition and subtraction.

an unsung mathematical odyssey

2008

Examines the mathematical genius of Benjamin Franklin and how he used mathematical ideas in his scientific work such as magic squares and circles.