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Finding All Solutions to a Puzzle

The non-zero digits can be organized into a 3-by-3 array such that each row, rneach column, and each diagonal adds up to the same total. How many solutions rnare there? Find and describe them.

Grade Level: High School (9-12)
Curriculum Topic Benchmarks: M1.4.2, M1.4.7, M1.4.8, M8.4.9, M8.4.12, M8.4.13, M8.4.15, M9.4.7
Subject Keywords: Algebra, equations, systems of equations, numeric puzzle, digits, array

Author(s): Ted Bainbridge, Ph.D.
PUMAS ID: 08_21_14_1
Date Received: 2014-08-21
Date Revised: 2015-03-24
Date Accepted: 2015-03-24

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