Puzzle of 30 Grid Points and 5 Circles

What Might This Be About?

9 January 2013, Created with GeoGebra

Problem

Given a 5×6 square grid.

a 5x6 square grid

Find five circles so that they pass through each of the 30 grid points at least once.

Solution

Here's one possible solution:

Puzzle of 30 Grid Points and 5 Circles - solution

Are there other, essentially different solutions?

Acknowledgement

This page is due to a suggestion by Alexandre Muñiz (on twitter) that the 5x5 puzzle has the extension to a 5x6 grid presented here.

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Copyright © 1996-2017 Alexander Bogomolny

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