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We always welcome your questions and feedback!

If you need to contact us for any reason, please use the email or address below.

  • Email Us:
    sales@tetractys.com

  • Mail Us:
    POIS Research
    P.O. Box 1243
    Saskatoon SK S7K 3N2
    Canada

Tetractys Number Puzzle: A Mathematical Learning System for Students

ONLY$9.95
Product Details

  • Publisher: POIS Research; First edition
  • Language: English
  • ISBN-13: 978-0-9959504-0-5
  • Product Dimensions: 8.5" x 5.5" x 0.2"
  • Paperback: 64 pages in full color (Saddle Stitch)

  • Note: Dry Erase Marker and Dry Eraser not included.
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