If 28 January 2003 was a Tuesday, then what day of the week would be 28 February 2005?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Monday
The weekday repeats every 7 days, so only the odd days, the days left over after whole weeks, move it forward. A year of 365 days has 1 odd day and a year of 366 days has 2. Moving from 28 January 2003 one step at a time:
28 January 2003 to 28 January 2004: 365 days (no 29 February in between), 1 odd day: Tuesday + 1 = Wednesday
28 January 2004 to 28 January 2005: 366 days (29 February 2004 falls in between), 2 odd days: Wednesday + 2 = Friday
28 January 2005 to 28 February 2005: 31 days of January, 3 odd days: Friday + 3 = Monday
Tip: A leap year adds its extra odd day only when 29 February lies inside the period counted; from 28 January 2003 to 28 January 2004 it does not, even though 2004 is a leap year.