8 ball pool, 9 ball pool, billiards.

The blue ball in the game of pool is the #2.

The lowest numbered ball in pool is the 1 ball. Pool does not assign points to the balls, so they are all of equal value.

The fifth ball in a pool ball triangle will dpend upon the game being played. In Straight Pool, it can be any of 13 different balls. Only the 1 and the 5 cannot be located there. In 8 Ball, the 5th ball must be the 8 ball.

There are many pool games that can be played on a pool table. Some pool table games include eight-ball, nine-ball, three-ball, one-pocket, and bank pool.