Last player to have cards wins. I, Nancy, invented this to get my kid, Jesse, to practice the addition facts. This game can be played with one or two decks, depending on how long you want the game to go on. Two cards are played at once, the lower subtracted from the higher. The highest sum wins the trick.
Wars go the same way.
This one was invented by both Nancy and Jesse on the floor of LAX airport at 1 a.m. while we were waiting for baggage and trying to save our sanity. This game can be played with one or two decks, depending on how long you want the game to go on. If two matches occur, play wars on each. If each player wins one of the wars, those cards are distributed and the original war must be played again. At the end of a war, all cards are turned face up and any groups of four or more of the same number are eliminated from the game.