Guess 2/3 of the average
Mathematical game / From Wikipedia, the free encyclopedia
In game theory, "guess 2/3 of the average" is a game that explores how a player’s strategic reasoning process takes into account the mental process of others in the game.[1]
In this game, players simultaneously select a real number between 0 and 100, inclusive. The winner of the game is the player(s) who select a number closest to 2/3 of the average of numbers chosen by all players.[2]