Sunita's birthday was on 15 March 2020, which was a Sunday. If her husband's birthday was on 31 May 2020, on which day would it fall?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Sunday
The weekday repeats every 7 days, so only the odd days, the days left over after whole weeks, move it forward. The days from 15 March to 31 May are counted month by month:
Rest of March (16th to 31st): 16 days
April: 30 days
May (1st to 31st): 31 days
Total: \(16+30+31=77\) days \(=11\) whole weeks, so 0 odd days
31 May 2020 falls on the same weekday as 15 March 2020, that is, Sunday.