If January 1, 2011 was a Wednesday, what day of the week was it on 1st January 2009?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Monday
An ordinary year has 365 days, that is, 52 weeks and 1 odd day, so the same date falls one weekday later in the next year (two days later after a leap year’s 29 February). Count the odd days from 1 January 2009 to 1 January 2011.
2009 is an ordinary year: 1 odd day
2010 is an ordinary year: 1 odd day
Total: 2 odd days, so 1 January 2011 is two weekdays after 1 January 2009
Going back two days from Wednesday: Wednesday → Tuesday → Monday