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Grey Matters Online Store : Memory & Mnemonics : 400 Digits of Pi : Souvenirs

After demonstrating your mastery of Pi, why not leave them with a souvenir to help remember the experience?
400-Digit Pi Challenge Greeting Cards (Pkg. of 6)
400-Digit Pi Challenge Greeting Cards (Pkg. of 6)
$19.95
400-Digit Pi Challenge Postcards (Package of 8)
400-Digit Pi Challenge Postcards (Package of 8)
$8.95


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