Hecho general: 91 is the amount of money one has if one has one coin of each U.S. denomination less than a dollar (penny, nickel, dime, quarter, half dollar) in cents.
Hecho matemático: 91 is the smallest pseudoprime in base 3.
Trivia: 91 is the amount of money one has if one has one coin of each U.S. denomination less than a dollar (penny, nickel, dime, quarter, half dollar) in cents.
Fecha histórica: March 31st is the day in 1949 that the Dominion of Newfoundland joins the Canadian Confederation and becomes the 10th Province of Canada.