Twenty-Four

Twenty-Four is a card game for either two or four players. While there are lots of card games that involve adding card values, Twenty-Four is fairly unique in that it allows players to subtract, multiply, and divide, too! Figuring out how to use the four mathematical operators to reach the target value of 24, and doing it quickly, is what the game is all about.

Twenty-Four likely originated in Shanghai, China, during the 1960s. Since then, it has spread to other Chinese cities, and it can be found in several other pockets of the world.

Object of Twenty-Four

The object of Twenty-Four is to be the first player to run out of cards. This is accomplished by using the values of four cards and the four mathematical operators to reach a solution of 24.

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Setup

Twenty-Four is played with a 40-card deck consisting of only number cards. To form such a deck, just take a deck of Denexa 100% Plastic Playing Cards and remove all the face cards. You’ll be left with aces through 10s in each of the four suits.

Shuffle and deal the entire deck out. Each player will receive 20 cards in the two-player game and 10 cards in the four-player game. Players may not look at their cards. Instead, each player squares up their cards into one face-down pile in front of them.

Game play

For two players

Each player turns up the top two cards from their stack and places them face up in the center of the table. Each player then tries to mentally reach a solution of 24 by adding, subtracting, multiplying, or dividing the pip values of the four cards. The solution must equal exactly 24, and use all four cards, in any order. Parentheses may be used to make the operations come out in the order the player wishes.

For example, with a board of 5, 7, 8, 9, a player might come up with the solution of 8 × 5 – (7 + 9) = 24.

When a player believes they have a solution, they slap the table. They then state their solution. If the other player agrees it is a correct solution, the player calling out the solution wins that set of cards. If the result of the equation is not actually 24, the other player wins the set. Whichever player loses takes the four cards and places them at the bottom of their stack.

If neither player can find a solution using the four cards on the table, they may each choose one of the cards they played to take back, placing it on the bottom of their stack, then play one new card from the top of their stack. They now attempt to solve this new set of four cards. Note that mathematically, 80% of sets are solvable, although some might be harder than others!

Game play continues until one player runs out of cards. That player is the winner.

For four players

The four player game is the same as the two-player game, with the following exceptions. First, each player contributes only one card to the table per set, rather than two. (This means if all agree that there is no solution, each player swaps the one card that they played, resulting in a totally different board.)

Secondly, the first player to slap the table does not immediately announce their solution. Instead, each player slaps the table as they arrive at a solution. When three players have come to a solution, the last player left chooses one of their opponents to state their solution. If they are unable to, or it is incorrect, the odd player out wins the set. Otherwise, they lose and must add the cards to their stack.

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