A leap year has an extra day in February, making the year 366 days long. How can you fig...

A leap year has an extra day in February, making the year 366 days long. How can you figure out which years are leap years? If we let L be the year, then L is a leap year when There is an exception to the rule. If mod 400, then L is a leap year.

The year 2000 was a leap year. If someone was born on February 29, 2000, and decides to celebrate birthdays only on February 29, how many birthdays will he or she have celebrated by the year 2070?