If 5 May 1911 is Friday, then what will be the day of the week on 11 September 1919?
Show answer & explanation
Correct answer: D
Explanation
Given: 5 May 1911 was Friday.
Now,
1911 to 1919 - 8 Years (6 Ordinary Year and 2 Leap Year).
And, In 8 Years = 2 Leap years and 6 Ordinary Year.
So, 2 Leap Year has 4 odd days,
And, 6 Ordinary Year has 6 odd days.
Total odd days = 4 + 6 = 10.
10 odd days - 10/7 = 1 week and 3 odd days.
then, 5 May 1919 will be Friday + 3 = Monday.
Now, the number of days between 5 May 1911 to 11 September 1919
= 26(May) + 30(June) + 31(July) + 31(August) + 11(September) = 129 days.
= 129 days - 129/7 = 18 week and 3 odd day.
So, 11 September 1919 will be Monday + 3 = Thursday.
Hence, the correct answer is 'Option 4'