Q. If in a particular year 12th January is a Sunday, then which one of the following is correct?
(a) 15th July is a Sunday if the year is a leap year.
(b) 15th July is a Sunday if the year is not a leap year.
(c) 12th July is a Sunday if the year is a leap year.
(d) 12th July is not a Sunday if the year is a leap year.
Correct Answer: (c) 12th July is a Sunday if the year is a leap year.
Question from UPSC Prelims 2020 CSAT Paper
Explanation :
12th January is a Sunday
No. of days in February is 29 if it is a leap year.
No. of days left in January = 31 – 12 = 19
Total no. of days till 12th July = (19 + 29 + 31 + 30 + 31 + 30 + 12) = 182
No. of odd days = 182 ÷ 7 = 26 weeks and 0 odd days.
So, 12th July is a Sunday if the year is a leap year.