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
Between 1982 and 1987 are 4 non-leap years and 1 leap year.
Each non-leap year is composed of 365 days; a leap year is composed of 366 days.
Thus, from June 25, 1982 to June 25, 1987, the total number of days = 4(365) + 366.
Since June 25, 1982 is a Friday, every passing of 7 days will yield another Friday.
364 is a multiple of 7.
Rephrase the total number of days in terms of 364:
4(365) + 366
= 4(364+1) + (364+2)
= (4*364 + 4) + (364+2)
= 5(364) + 6
= (multiple of 7) + 6
= Friday + 6 days
= Thursday.
The correct answer is
E.
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