Class 10 Exam > Class 10 Questions > On January 12, 1980, it was Saturday. The day...
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On January 12, 1980, it was Saturday. The day of the week on January 12, 1979 was
- a)Friday
- b)Sunday
- c)Thursday
- d)Saturday
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
On January 12, 1980, it was Saturday. The day of the week on January 1...
The year 1979 is an ordinary year, it has one odd day.
So, the day on 12th January 1980, is one day beyond the day on 12th January 1979.
January 12, 1980 being Saturday
∴ January 12, 1979, was Friday.
So, the day on 12th January 1980, is one day beyond the day on 12th January 1979.
January 12, 1980 being Saturday
∴ January 12, 1979, was Friday.
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Community Answer
On January 12, 1980, it was Saturday. The day of the week on January 1...
Explanation:
To determine the day of the week for a given date, we can use various methods such as the Zeller's Congruence formula or a perpetual calendar. In this case, we can use a perpetual calendar to find the day of the week for January 12, 1980, by first finding the day of the week for January 12, 1979.
Step 1: Find the day of the week for January 12, 1979
- We know that January 12, 1980, is a Saturday.
- We can infer that January 12, 1979, is one day before January 12, 1980.
- Therefore, January 12, 1979, is one day before Saturday, which means it is a Friday.
Step 2: Find the day of the week for January 12, 1980
- We know that January 12, 1980, is one year after January 12, 1979.
- In a non-leap year, the day of the week advances by one day.
- Therefore, if January 12, 1979, is a Friday, then January 12, 1980, will be the next day, which is Saturday.
Conclusion:
The day of the week on January 12, 1979, was Friday, and the day of the week on January 12, 1980, was Saturday. Therefore, option A, Friday, is the correct answer.
To determine the day of the week for a given date, we can use various methods such as the Zeller's Congruence formula or a perpetual calendar. In this case, we can use a perpetual calendar to find the day of the week for January 12, 1980, by first finding the day of the week for January 12, 1979.
Step 1: Find the day of the week for January 12, 1979
- We know that January 12, 1980, is a Saturday.
- We can infer that January 12, 1979, is one day before January 12, 1980.
- Therefore, January 12, 1979, is one day before Saturday, which means it is a Friday.
Step 2: Find the day of the week for January 12, 1980
- We know that January 12, 1980, is one year after January 12, 1979.
- In a non-leap year, the day of the week advances by one day.
- Therefore, if January 12, 1979, is a Friday, then January 12, 1980, will be the next day, which is Saturday.
Conclusion:
The day of the week on January 12, 1979, was Friday, and the day of the week on January 12, 1980, was Saturday. Therefore, option A, Friday, is the correct answer.
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On January 12, 1980, it was Saturday. The day of the week on January 12, 1979 wasa)Fridayb)Sundayc)Thursdayd)SaturdayCorrect answer is option 'A'. Can you explain this answer?
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