If the 21st of June 2021 was Monday, what day of the week was it on the 11th of June 2023?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Sunday
The day of the week moves forward by the number of odd days (days left over after full weeks). An ordinary year of 365 days is 52 weeks and 1 odd day; a span that contains 29 February has 2.
21 June 2021 to 21 June 2022: 365 days (no 29 February in between), 1 odd day: Monday → Tuesday
21 June 2022 to 21 June 2023: 365 days (2023 is not a leap year), 1 odd day: Tuesday → Wednesday
11 June 2023 is 10 days before 21 June 2023; 10 days = 1 week + 3 odd days, so count 3 days back from Wednesday: Tuesday, Monday, Sunday