A New Divisibility Test for a Class of Integers
Abstract
The author discusses a recently-discovered divisibility test for the infinite class of integers ending in 1, 3, 7, or 9. He explains how to apply the divisibility test, provides examples, includes an explanation (proof) of why the test works, and provides some ideas to try in the classroom. The article ends with a method for extending the divisibility test to all integers.
Keywords: divisibility
How to Cite:
Minor, D., (2022) “A New Divisibility Test for a Class of Integers”, Ohio Journal of School Mathematics 92(1), 8--12. doi: https://doi.org/10.18061/ojsm.4209
Rights:
Darrell Minor
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