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- "Experience a one-of-a-kind mathematical puzzle collection that defies convention."
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- OWL
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$2.00
- "Unlock the world of mathematics with over 100 engaging activities. Dive into the realm of magic squares, deltoids, number patterns, and more. Expand your mathematical horizons and enjoy hours of educational fun."
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- OWL
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$2.00
- "Dive into a diverse collection of mind-bending number manipulations that will spark your curiosity and challenge your mathematical thinking. Explore a world of thought-provoking numerical puzzles and exercises."
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