June 25, 1982, fell on a Friday. On which day of the week did December 25, 1983, fall?
Answers
A) Sunday  B) Monday  C) Tuesday  D) Wednesday  E) Thursday
6/25/82 - 12/25/83   The date range contains one full year of 365 days plus a partial year. The number of days in the partial year is:   June - 5, July - 31, August - 31, September - 30, October - 31, November - 30, and December - 25.   5 + 31 + 31 + 30 + 31 + 30 + 25= 
<gadget id="calculator">5 + 31 + 31 + 30 + 31 + 30 + 25</gadget>
<output>183</output>
183.   183 + 365= 
<gadget id="calculator">183 + 365</gadget>
<output>548</output>
548 total days in the date range.   Divide by 7 to determine how much the day of the week advances: 548 / 7= 78 remainder 2.   Since the first date was a Friday, advance the day of the week by 2; the second date fell on a Sunday. The answer is Sunday.
<result>A</result>
June 25, 1982, fell on a Friday. On which day of the week did December 25, 1983, fall?