On 7th February, 2002 it was Thursday. What was the day of the week on 1st January, 2001?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Monday
The weekday repeats every 7 days, so only the odd days, the days left over after whole weeks, change it. Going back from 7 February 2002 to 1 January 2001, the weekday moves back by the number of odd days in between.
1 January 2001 to 1 January 2002: 365 days (2001 is not a leap year), 52 weeks + 1 odd day
1 January 2002 to 7 February 2002: 31 days of January + 6 days of February = 37 days, 5 weeks + 2 odd days
Total: 3 odd days, so 1 January 2001 fell 3 weekdays before Thursday: Thursday − 3 = Monday