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TR-8283
Seven wooden strips with random numbers written on both sides are displayed. A volunteer is asked to place any five strips in any order into a wooden frame thus forming five, five-digit numbers. Instantly reveal the total of these five five-digit number
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BK-6335
Magical Mathematics reveals the secrets of amazing, fun-to-perform card tricks--and the profound mathematical ideas behind them--that will astound even the most accomplished magician. Persi Diaconis and Ron Graham provide easy,
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