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If on Sept. 11, 1975 it was Thursday, then what was the day of the week on Sept. 11, 1977?
  • a)
    Monday
  • b)
    Wednesday
  • c)
    Friday
  • d)
    Sunday
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
If on Sept. 11, 1975 it was Thursday, then what was the day of the wee...
In an ordinary year, there are 365 days and on dividing 365 by 7 we get remainder = 1 so this extra one day is taken as an odd day.
Similarly, in a leap year, there are 366 days and on dividing 366 by 7 we get remainder = 2 so these extra 2 days are taken as the odd days.
Thus, the remainder which we get after dividing the number of days by 7 is considered as odd days.
Now, we have to calculate the odd days from Sept. 11, 1975 – Sept. 10, 1977.
Sept. 11, 1975 – Sept. 10, 1976 = 366 days = 2 odd days (as 1976 is the leap year and February 29 is included in this period).
Sept. 11, 1976 – Sept. 10, 1977 = 365 day = 1 odd day
Total odd days = 3
Thus, Sept. 11, 1977 is 3 days (of the week) beyond the day of Sept. 11, 1975.
∴ Sept. 11, 1975 (Thursday) → Sept. 11, 1977 (Sunday)
Hence, ‘Sunday’ is the correct answer.
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Most Upvoted Answer
If on Sept. 11, 1975 it was Thursday, then what was the day of the wee...
In an ordinary year, there are 365 days and on dividing 365 by 7 we get remainder = 1 so this extra one day is taken as an odd day.
Similarly, in a leap year, there are 366 days and on dividing 366 by 7 we get remainder = 2 so these extra 2 days are taken as the odd days.
Thus, the remainder which we get after dividing the number of days by 7 is considered as odd days.
Now, we have to calculate the odd days from Sept. 11, 1975 – Sept. 10, 1977.
Sept. 11, 1975 – Sept. 10, 1976 = 366 days = 2 odd days (as 1976 is the leap year and February 29 is included in this period).
Sept. 11, 1976 – Sept. 10, 1977 = 365 day = 1 odd day
Total odd days = 3
Thus, Sept. 11, 1977 is 3 days (of the week) beyond the day of Sept. 11, 1975.
∴ Sept. 11, 1975 (Thursday) → Sept. 11, 1977 (Sunday)
Hence, ‘Sunday’ is the correct answer.
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If on Sept. 11, 1975 it was Thursday, then what was the day of the week on Sept. 11, 1977?a)Mondayb)Wednesdayc)Fridayd)SundayCorrect answer is option 'D'. Can you explain this answer?
Question Description
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