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- 6. On 8th Dec, 2007 Saturday falls. What day of the week was it on 8th Dec, 2006?
A.Saturday
B.Tuesday
C.Friday
D.Monday
Answer & Explanation
Answer: Option C
The year 2006 is an ordinary year. So, it has 1 odd day.
So, the day on 8th Dec, 2007 will be 1 day beyond the day on 8th Dec, 2006.
But, 8th Dec, 2007 is Saturday
S0, 8th Dec, 2006 is Friday.
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- 7. Today is Thursday. After 91 days, it will be:
A.Tuesday
B.Thursday
C.Monday
D.Sunday
Answer & Explanation
Answer: Option B
Each day of the week is repeated after 7 days.
So, after 91 days, it will be Thursday. 91/7 = 0
∴ After 91 days, it will be Thursday.
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- 8. It was Saturday on January 1, 2005. What was the day of the week December 31, 2009?
A.Thursday
B.Saturday
C.Wednesday
D.Monday
Answer & Explanation
Answer: Option A
on 31st December, 2004 it was Friday.
Number of odd days from the year 2005 to the year 2009 = (1 + 1 + 1 + 2 + 1) = 6 days.
Friday + 6 Days = 5 + 6 = 11 days. => 11/7 = 4
On 31st December 2009, it was Thursday.
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- 9. What was the day of the week on 23rd December, 2011?
A.Thursday
B.Saturday
C.Friday
D.Sunday
Answer & Explanation
Answer: Option C
23 December, 2011 = (2010 years + Period from 1.1.2011 to 23.12.2011)
Odd days in 1600 years = 0
Odd days in 400 years = 0
10 years = (8 ordinary years + 2 leap year) = (8 x 1 + 2 x 2) = 12 odd days
Jan. Feb. March April May June July Aug. Sep. Oct. Nov. Dec)
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 23 ) = 357 days
357 days = (51 weeks) = 0 odd day.
Total number of odd days = (0 + 0 + 12 + 0) = 12 = 5 odd day.
Given day is Friday.
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- 10. What was the day of the week on 21st September, 1987?
A.Monday
B.Saturday
C.Friday
D.Wednesday
Answer & Explanation
Answer: Option A
What was the day of the week on 21st September, 1987?
21st September, 1987 = (1986 years + Period from 1.1.1987 to 21.9.1987)
Odd days in 1600 years = 0
Odd days in 300 years = (5 x 3) = 1
86 years has 21 leap years + 65 ordinary years.
Number of odd days in 86 years ( 21 x 2 + 65) = 107 = 2 odd days.
Jan. Feb. March April May June July Aug Sep
(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 21) = 264 days
168 days = 37 weeks = 5 odd day.
Total number of odd days = (0 + 1 + 2 + 5) = 8. 8/7 = 1 odd day
Given day is Monday.
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