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If July 9th,2013 falls on Sunday then Jan 7th,2014 falls on which day?

  • A.Sunday
  • B.Saturday
  • C.Monday
  • D.Friday

Answer: A

Count the days from 9 July 2013 to 7 January 2014:

MonthDays counted
July (after the 9th)22
August31
September30
October31
November30
December31
January (to the 7th)7
Total182

\[ 182 = 7 \times 26 \quad\Longrightarrow\quad 182 \equiv 0 \pmod 7 \]

The interval is a whole number of weeks, so the day does not shift at all: 7 January 2014 falls on the same day as 9 July 2013, namely Sunday.

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