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When the game of "21″ was introduced to the U.S., casinos offered a bonus for specific hands in the game. One of those bonuses involved a special, 10-to-1 bonus if the player's hand ended up being an ace of spades in addition to a "black jack," or a jack of spades or clubs.

While the bonus went away, the name given to this particular combination of cards stuck and eventually became the name for the most popular casino card game in the world, "blackjack."

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11y ago

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