55five.on

55 fiveOVERVIEW OF 55. 55 is a trick-taking card game for 2 to 9 players. It’s closely related to the 25 with a few major differences. There is bidding in 55 and55 is a square pyramidal number. 55 is: . the 10th Fibonacci number [1] and the 10th triangular number, [2] The sum of 55's dits is also 10.; the 5th heptagonal number, [3] the 5th square