In this game, you take groups of cards from the 'market' and put them sorted by colour in your collection. By taking a perfect number from the market, you can cash a colour row from your collection. This row is turned over, giving each card one point at the end of the game. Long rows yield bonus points. But beware, this increases the chance that you will have to discard cards!
Perfect Numbers is an eco game for its production uses FSC materials and biodegradable ink, glue and plastic.