Correct option is C
Given:
31 December 2015 was a Thursday
Concept used :
Number of odd days in leap year = 2 days
Number of odd days in non-leap year = 1 day
Calculate the number of odd days
from 1st January 2016 to 31st December 2019: 2016: Leap year, so 2 odd days.
2017: Ordinary year, so 1 odd day.
2018: Ordinary year, so 1 odd day.
2019: Ordinary year, so 1 odd day.
Total odd days = 2 + 1 + 1 + 1 = 5 odd days.
31 December 2015 was a Thursday
Concept used :
Number of odd days in leap year = 2 days
Number of odd days in non-leap year = 1 day
Calculate the number of odd days
from 1st January 2016 to 31st December 2019: 2016: Leap year, so 2 odd days.
2017: Ordinary year, so 1 odd day.
2018: Ordinary year, so 1 odd day.
2019: Ordinary year, so 1 odd day.
Total odd days = 2 + 1 + 1 + 1 = 5 odd days.
Calculate the number of odd days from 1st January 2020 to 1st July 2020
January: 31 days = 4 weeks and 3 odd days.
February: 29 days (leap year) = 4 weeks and 1 odd day.
March: 31 days = 4 weeks and 3 odd days.
April: 30 days = 4 weeks and 2 odd days.
May: 31 days = 4 weeks and 3 odd days.
June: 30 days = 4 weeks and 2 odd days.
July 1 day = 1 odd days
Total odd days = 3 + 1 + 3 + 2 + 3 + 2 +1 = 15 odd days.
February: 29 days (leap year) = 4 weeks and 1 odd day.
March: 31 days = 4 weeks and 3 odd days.
April: 30 days = 4 weeks and 2 odd days.
May: 31 days = 4 weeks and 3 odd days.
June: 30 days = 4 weeks and 2 odd days.
July 1 day = 1 odd days
Total odd days = 3 + 1 + 3 + 2 + 3 + 2 +1 = 15 odd days.
Total odd days: 5 (from 2016-2019) + 15 (from 2020) = 20 odd days.
Divide the total odd days by 7: 20 ÷ 7 = remainder 6.
Add the remainder to the starting day: Thursday + 6 days = Wednesday
Therefore, 1st July 2020 was a Wednesday
English
100 Questions
100 Marks
90 Mins
