Ten. It is the perfect score for most Olympic competitions. It is the interstate highway that goes from Florida to California. It is the number of years Odysseus journeyed after the War of Troy. It is the base of the decimal numeral system, by far the most common system of recording numbers in both written and spoken language. It is the atomic number of neon. It is the number of commandments listed in the book of Exodus. It is the U.S. currency denomination that pictures Alexander Hamilton. It is also the number of years that have passed since we became graduates of Luther College.