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Proof Without Words: The Difference of Consecutive Integer Cubes Is Congruent to 1 Modulo 6

Claudi Alsina, Roger Nelsen and Hasan Unal
The College Mathematics Journal
Vol. 45, No. 2 (March 2014), p. 135
DOI: 10.4169/college.math.j.45.2.135
Stable URL: http://www.jstor.org/stable/10.4169/college.math.j.45.2.135
Page Count: 1
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Abstract

Summary We prove wordlessly that the difference of consecutive integer cubes is congruent to 1 modulo 6.

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