Decade or Ten-Twenty-Thirty is a Patience game played with a traditional 52-card deck.
Using a standard 52-card deck of playing cards (without jokers), three cards are drawn from the bottom of the deck and placed face-up in a line on the table laid out in the order they were drawn so the faces can be read. Repeat this for a total of seven stacks.
Spot cards (cards from ace, deuce, etc. to ten) count their face value while face cards (jack, queen, and king) are valued at ten points. If the total of three consecutive cards in the line equals 10, 20 or 30, they are discarded. Continue working left to right to add a card to the bottom of each stack removing cards as decades are matched.
The game continues until all cards are dealt or discarded, or when no more sets can be collected. The object of the game is to have as few cards as possible at the end; the game is won if all cards are discarded.