Liar's Poker

Liar's poker is a bar game that combines statistical reasoning with bluffing, and is played with the eight-digit serial number on a U.S. dollar bill. Normally the game is played with a stack of random bills obtained from the cash register. The objective is to make the highest bid of a number that does not exceed the combined total held by all the players. The numbers are usually ranked in the following order: 2,3,4,5,6,7,8,9,0 (10) and 1 (Ace). If the first player bids three 6s, he is predicting there are at least three 6s among all the players, including himself. The next player can bid a higher number at that level (three 7s), any number at a higher level (four 5s) or challenge. The end of the game is reached when a player makes a bid that is challenged all around. If the bid is successful, he wins a dollar from each of the other players, but if the bid is unsuccessful, he loses a dollar to each of the other players.

Liar's dice is a similar game played with dice, often as a drinking game.

Read more about Liar's Poker:  Liar's Poker Probabilities, Liar's Poker Tactic - 'Damned If I Do, Damned If I Don't' - Situation, Example Game, In Popular Culture

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