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Sphinx Album

Task 166, Sphinx, represents every aspect of the rich process and content that is within each task. It is amazing how such an easy to state, easy to start problem has produced so much mathematics.

We suggest you begin by investigating the Iceberg of the Sphinx to understand what we mean by a task being the tip of an iceberg. Then, when you have a bit more time, move on to the links below.

Students and teachers from the middle 90s began the Sphinx adventure. The revelations below would not have happened without the input of these earlier mathematicians. The Sphinx Album continues to grow. If you have Sphinx photos to include, email them with a brief story to our Contacts above.

See the Resources link for information about ordering Sphinx Shapes.

Amy & Emma Trinity Academy (formerly Thorne Grammar) Doncaster, UK

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Sphinx Album Pages

Choose a page or go directly to an item of interest.
Page 1   Page 3
Mathematics Task Centre Logo

Story of the Logo

Page 2

Page 4


The video Adventure of the Sphinx made by Year 8 students in Pam McGifford's class at Cressy District High School brings together many of the pages of this album.
Our Research section reports how working like a mathematician improved test scores for these children.
Page 5
  • Decorated Sphinxes
    An example from Wade High School that might start a new fashion trend.
Page 6
  • Donna Dubey, Winnisquam Regional High School, USA is encouraged by her Algebra 1 students to build an absolutely huge Sphinx and discovers how much they learn. (Note: This page is stored as a teacher story in the Research & Stories link.)


Page 7
  • Anna Casey explains something of the development of a 642 Sphinx which took over her Year 6 class at Scotch College Junior School, Adelaide, Australia for many weeks.
Page 8
  • Saied Alavei discovers the Sphinx Album and immediately cuts up wood left over after trying to build a kayak so his Year 6 children can start exploring the Sphinx.
Nickey Harland, St. Mary's School, West Wyalong, was exploring Sphinx in a workshop. She thinks her diagram above shows you can tessellate the plane with a rotation pattern of Sphinxes from a central point. Is she right?
And more...
  • begins with the leftover rectangle created with an A4 (or other metric paper) is folded to remove the largest possible square. David Mitchell, Origami Heaven, shows how to fold this often discarded part to create a Sphinx. Now you can have lessons about the square and save all the leftovers for later lessons about the Sphinx.
  • Sphinx is a self-replicating shape. Find out more about self-replicating shapes in Wikipedia at this Rep-Tile link.
  • In particular, this link refers to the recent discovery of two new pentagonal Rep-tiles, but the Sphinx remains the only one that repeats itself with pieces the same size.

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