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The Unexpected Hanging, Martin Gardner
Penrose Tiles to Trapdoor Ciphers, Martin Gardner
:
http://math.rice.edu/~lanius/frac/index.html
http://www.alcyone.com/max/lit/flatland/
http://www.calormen.com/Flatland/
http://www.cut-the-knot.org/do_you_know/dimension.shtml
http://www.shodor.org/interactivate/lessons/pattern2.html
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cycle 1 level 3- papernowebA.pdf - 2012 - - - 2012
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