Solution to Problem 25

Congratulations to this week's winner

Ray Kremer

A correct solution was also received from Kevin Bourrillion. One incorrect submission was received.

Let 2n + 1 = z2. Note that z must be odd. Simple algebra gives z2/2 + 1/2 = n + 1.

The following "Solution Without Words" was Ray Kremer's little gem.

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Page last updated 8 December 1997.