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The Case of the Ad That Subtracts and Other True Math Mysteries for You to Solve
Danielle S. HammelefSeries: Seriously True Mysteries(0)
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They're multiplied and divided. They're spectacular and average. What are they? Math mysteries, of course! Get ready to crack the cases and the real math info wide open. You might need your abacus for this one.
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- SeriesSeriously True Mysteries