<P> In a standard deck, there are usually two Jokers . The Joker's use varies greatly . Many card games omit the card entirely; as a result, Jokers are often used as informal replacements for lost or damaged cards in a deck by simply noting the lost card's rank and suit on the joker . Other games, such as a 25 - card variant of Euchre which uses the joker as the highest trump, make it one of the most important in the game . Often, the joker is a wild card, and thereby allowed to represent other existing cards . The term "joker's wild" originates from this practice, as does the game show of the same name . The Joker Is Wild is also the name of a 1957 film starring Frank Sinatra . </P> <P> The Joker can be an extremely beneficial, or an extremely harmful, card . In Euchre it is often used to represent the highest trump . In poker, it is wild . However, in the children's game named Old Maid, a solitary joker represents the Maid, a card that is to be avoided . </P> <Ul> <Li> Euchre, 500: As the highest trump or "top Bower". </Li> <Li> Canasta: The joker, like the deuce, is a wild card . However, the joker is worth 50 points in melding, as opposed to 20 for the deuce . </Li> <Li> Gin Rummy: a wild card, able to be used as any necessary rank or suit to complete a meld . </Li> <Li> Chase the Joker: An alternative version of Old Maid where the Joker card is used instead of the Ace . </Li> <Li> War: In some variations, beats all other cards . </Li> <Li> Pitch: A point card in some variations . Jokers usually are marked as "High" and "Low", one outranking the other . </Li> <Li> Mighty: Second most - powerful card in the game, though it cannot be legally played on the first or last trick . </Li> <Li> Daihinmin: a wild card, or a deuce (which ends the round and clears the discard pile). </Li> <Li> Crazy Eights: a "skip" card, playable on top of any other card, that forces the next player to lose a turn . </Li> <Li> Spades: uncommon, but can fulfill one of two roles . When playing with three or six players they are added to make the cards deal evenly (18 or 9 cards each, respectively). They are either "junk" cards playable anytime that cannot win a trick, or they count as the two highest trumps (the two Jokers must be differentiable; the "big Joker" outranks the "little Joker"). They also can be used in conjunction with teammates cards to create a pseudo - "trump", i.e. an Ace of Hearts and Joker played together would be counted as an Ace of Spades, inferior only to a natural Ace of Spades . </Li> <Li> Double King Pede: As the lowest - ranked card, but worth 18 points . </Li> <Li> Go Fish: In a game with two players, the joker pair is often used to bring the number of pairs to 27 and prevent a 13 - 13 tie . </Li> </Ul> <Li> Euchre, 500: As the highest trump or "top Bower". </Li>

Why do they have jokers in a deck of cards