Calculating 24

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The rule is simple: pick any four cards and try to get a result of 24 from the numbers on the cards, using only the four basic arithmetic operations: addition (+), subtraction (-), multiplication (*), and division (/).

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Jack (J), Queen (Q), King (K), and Ace (A) represent 11, 12, 13, and 1 respectively.

For example, given numbers 2, 3, 5 and 8, we can get such an expression: .

This Demonstration tries to find all distinct answers for four given cards.

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Contributed by: Xiangdong Wen (March 2011)
Open content licensed under CC BY-NC-SA


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