40: Percentage of Americans who can name more than four of the Ten Commandments

50: Percentage who can cite any of the four authors of the Gospels

12: Percentage who believe Joan of Arc was Noah’s wife

75: Percentage who believe the Bible teaches that “God helps those who help themselves” (it’s a Ben Franklin saying)

85: Percentage of Americans who say they are Christian

Source: Harper’s Magazine, August 2005