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WBCS Preliminary Examination 2021 — General Studies · Question 180 of 200

Q180
ReasoningCalendar & Clocks
Today is Thursday, the day after 59 days will be
  1. a.Sunday
  2. b.Thursday
  3. c.Friday
  4. d.Saturday

Answer: (A) Sunday

The days of the week repeat every 7 days. $59=7\times8+3$, so 59 days later is the same as 3 days after Thursday: Friday, Saturday, Sunday. Hence Sunday. Shortcut: divide the number of days by 7 and count forward by the remainder (the 'odd days'); a remainder of 0 gives the same day, which is why option (B) would need 56 or 63 days.