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Four Circles
by
Thomas H. O'Beirne
The four intersecting circles have to be drawn in the traditional way -
neither taking a pencil off the paper, nor going over any part of the line
twice.
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In Ancient Greece
after
Martin Gardner
Make your own virtual travel to discover the secret of an ancient symbol.
The main thing is to make the journey as straight as possible.
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The Quarrelsome Neighbors
after
Sam Loyd
Help three neighbors to plan uncrossing pathways from their houses to
their park's gates. Hopefully this will reconcile them!
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Three Squares
after
Lewis Carroll
It almost doesn't cost a thing to draw three squares without taking a
pencil off the paper and without crossing the line. Or does it?
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Nine Points
Nine points, four lines, a pencil and... possibly an eraser. Go through
all the points not lifting a pencil off the paper.
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More Millennium Puzzles
Last Updated: November 4, 2009
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