Which of the following years were leap years according to the calendar then in use: 1000,1492,1600,and 1776?

Question

Quizplus · Accepted Answer

The rule for leap years in use during these years was that a year is a leap year if it is divisible by 4, except for years divisible by 100, which are only leap years if also divisible by 400. Using this rule, all four years listed are leap years: 
- 1000 is divisible by 4, but not by 100, so it is a leap year.
- 1492 is also divisible by 4, but not by 100, so it is also a leap year.
- 1600 is divisible by 4, by 100, and by 400, so it is a leap year.
- 1776 is divisible by 4, but not by 100 (though it is divisible by 4 again), so it is a leap year.

Which of the Following Years Were Leap Years According to the Calendar