This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
cards:red_black_relationship_principle [2013/12/26 19:19] – tylerwilson | cards:red_black_relationship_principle [2014/01/18 08:39] – tylerwilson | ||
---|---|---|---|
Line 3: | Line 3: | ||
This principle makes use of the fact that there is an equal number of red and black cards in the deck. Thus when two piles are formed, one with x cards and the remainder with 52-x cards, then the number of red cards in x equals the number of black cards in the remainder plus 26-x. A special case is that the two piles are equal with 26 cards each, since in that case 26-x=0 and thus the red cards in one half equal the black cards in the other half. | This principle makes use of the fact that there is an equal number of red and black cards in the deck. Thus when two piles are formed, one with x cards and the remainder with 52-x cards, then the number of red cards in x equals the number of black cards in the remainder plus 26-x. A special case is that the two piles are equal with 26 cards each, since in that case 26-x=0 and thus the red cards in one half equal the black cards in the other half. | ||
- | The roots of the trick can be found in an old puzzle involving the literal mixing of wine and water. David Singmaster has traced this puzzle back to // | + | The roots of the trick can be found in an old puzzle involving the literal mixing of wine and water. David Singmaster has traced this puzzle back to // |
Oscar Weigle published "The Little Star Prediction" | Oscar Weigle published "The Little Star Prediction" | ||
- | Robert Hummer made use of the principle, in expectedly unusual ways. See [[http:// | + | Robert Hummer made use of the principle, in expectedly unusual ways. See [[http:// |
Another early use is Warren Wiersbe' | Another early use is Warren Wiersbe' |