21-card trick - Numberphile
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Chinese Remainder Theorem and Cards - Numberphile
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Does -1/12 Protect Us From Infinity? - Numberphile
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Learn how to perform The 21 Card Trick (The Pro's Version)
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Bill Malone - 21 Card Trick
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A Surprising Pi and 5 - Numberphile
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Gabriel's Horn Paradox - Numberphile
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The Light Switch Problem - Numberphile
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