Any wager that has two or more selections is considered a parlay bet, and you can usually add up to 14 selections, but this depends on the sportsbook. The more selections you include, the greater the odds, but also the greater the difficulty, so finding the balance between risk and reward is important.

Blackjack (formerly black jack and vingt-un) is a casino banking game. It is the most widely played casino banking game in the world. It uses decks of 52 cards and descends from a global family of casino banking games known as "twenty-one".