Following the third, fourth, or fifth digit, every number up through 15 is the account number while that final number, 16, is the check digit. All Discover cards start with the number six and are 16 digits in length, while petroleum cards start with the number seven and airline cards start with the number one.
Vatican City. Vatican City â 0.2 square miles â The worldâs smallest state, the Vatican has a population of 770, none of whom are permanent residents. The tiny country which surrounds St. Peterâs Basilica is the spiritual center for the worldâs Roman Catholics (over 1 billion strong).
Apart then being the second smallest state in Europe (and the world), Monaco is also the most densely populated country in the world. Smallest Countries In Europe: Monaco. 3. San Marino â 61 km 2 (24 mi 2) â The republic of San Marino is an enclave within Italy and has a population of around 30,000 people.ocated within Rome, the smallest state in Europe has a population of just over 800 people. Smallest Countries In Europe: Vatican City, In the heart of Rome. 2. Monaco â 2.02 km 2 (0.78 mi 2) â The Principality of Monaco achieved full independence from France in 1860.