Concentration (game) as an educational game. Any deck of playing cards may be used, although there are also commercial sets of cards with images. The rules given here are for a standard deck of 52 cards, which are normally laid face down in four rows of 13 cards each. The two jokers may be included for a total of six rows of nine cards each. Additional packs can be used for added interest. Standard rules need not be followed: the cards can be spread out anywhere, such as all around a room. In turn, each player chooses two cards and turns them
500 rum effort to go out as quickly as possible. When any player goes out, the play ends and the score of each partnership is figured as a unit. The game is over when either side reaches +500. The team with the highest score over 500 wins, even if a team goes out first. The game is the same as partnership 500 rum, with the following exceptions, and the pack is 56 cards: the standard 52 cards plus four jokers. Each joker counts as 20 points, and jokers may not be used in sequences or as wild cards, but only in groups