Decade is a solitaire
card game using a deck of 52 playing cards. While akin to another
solitaire game called Accordion, addition plays a part in this game.
Cards are dealt one at a time. When two or more cards that add up to
ten, twenty, or thirty points and are adjacent to each other are
found, these cards are discarded. While the spot cards (cards from
ace to ten) have their face value, face cards (jack, queen, and
king) are valued at ten points.
The game continues until all cards are dealt. The game is won when
all cards are discarded.