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# June 25, 1982, fell on a Friday. On which day of the week

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Manager
Joined: 06 Nov 2008
Posts: 53

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June 25, 1982, fell on a Friday. On which day of the week [#permalink]

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11 Dec 2008, 18:18
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

June 25, 1982, fell on a Friday. On which day of the week did June 25, 1987, fall? (Note: 1984 was a leap year.)

A. Sunday
B. Monday
C. Tuesday
D. Wednesday
E. Thursday

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SVP
Joined: 29 Aug 2007
Posts: 2472

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11 Dec 2008, 20:30
haichao wrote:
June 25, 1982, fell on a Friday. On which day of the week did June 25, 1987, fall? (Note: 1984 was a leap year.)

A. Sunday
B. Monday
C. Tuesday
D. Wednesday
E. Thursday

June 25, 1982 - June 24, 1983 = 365 days
June 25, 1983 - June 24, 1984 = 366 days (leap year)
June 25, 1983 - June 24, 1985 = 365 days
total days = 1096 days
no of weeks = 1096 days/7 = 156 weeks and 4 days
4th days is June 24, 1985 and it is monday. so June 25, 1985 has to be tuesday.

C.
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Manager
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11 Dec 2008, 21:11
Question is June 25, 1987?

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Manager
Joined: 27 May 2008
Posts: 200

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11 Dec 2008, 21:20
My approach is

no. of weeks = 365/7 = remainder is 1 . so for normal yr. the day will shift by 1.
and for leap yr 366/7 remainder is 2, so the days will shift by 2.

by applying above rules,

June 25, 1982 is Friday
June 25, 1983 is Saturday
June 25, 1984 is Monday (Since leap yr)
June 25, 1985 is Tuesday
June 25, 1986 is Wednesday
June 25, 1987 is Thursday

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Re: leap   [#permalink] 11 Dec 2008, 21:20
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