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On 17th March, 1997 Monday falls. What day of the week was it on 17th March, 1996?

  • A.Monday
  • B.Tuesday
  • C.Sunday
  • D.Wednesday

Answer: C

Only the remainder on division by 7 matters - the odd days.

Step back one year from 17 March 1997 to 17 March 1996. Although 1996 is a leap year, 29 February 1996 falls before 17 March 1996, so it lies outside the interval.

\[ 365 \text{ days} \rightarrow 1 \text{ odd day} \]

\[ \text{Monday} - 1 = \textbf{Sunday} \]

Whether the leap day counts depends on where it falls relative to the two dates, not merely on whether the year is a leap year.

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