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Speed Math: The + Puzzle

Author Prof. R Stinson
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Book Details
ISBN / ASINB00ILILZK2
ISBN-13978B00ILILZK2
MarketplaceUnited Kingdom 🇬🇧

Description

This book is about a new math puzzle, which I have invented, helps you to build speed, focus, memory etc. It has worked wonders for my students and hope it does the same for you.