If 31 January 2022 was a Monday, what was the day on the same date 100 years ago?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Tuesday.
Number of leap years in 100 years = 25
Number of ordinary years in 100 years = 75
Total number of odd days in 100 years = (25 × 2 + 75 × 1) ÷ 7 = 125 days ÷ 7 = 6 odd days
Day on 100 years before 31 Jan 2022 = Monday - 6 odd days = Tuesday
Hence, the correct answer is Tuesday.