Polyhedral dice have been used for thousands of years; but did you know that when Dungeons & Dragons was first published, it used only five dice? What about the other two? Let's learn a little bit about the history of D&D dice sets through the twentieth century. The History of D&D Dice An illustration of important twentieth-century innovations in the game of Dungeons & Dragons and the dice used to play it 1904 Albert Friedenthal files patent 809,293 for a 10-sided die. 1913 H.G. Wells publishes Little Wars, a set of rules for playing with miniature infantry, cavalry, and artillery....
You probably already know how probability works for rolling a die.
But did you know why Dungeons & Dragons likes to roll 4 dice, and remove the lowest roll, to generate optimal ability scores for a character?
Did you know that you're 20x as likely to roll an 18 with this method than to roll a 3?
Let's find out why.