IF JAN 15 1997 WAS WEDNESDAY, WHAT DAY OF WEEK WAS ON JAN 5 2000??
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15th June 1776 = (1775 years + Period from 01.01.1776 to 15.06.1776)
Counting of odd days:
No of odd days in 1600 years = 0
No of odd days in 100 years = 5
75 years = 18 leap years + 57 ordinary years
= 18*2 + 57*1
= 36 + 57
= 93 odd days
= 13 weeks + 2 odd days = 2 odd days
∴ 1775 years have (0+5+2) = 7 odd days = 0 odd days.
Jan to May = (31+29+31+30+31)
= 152 days
Add 15 days of June.
= 152 + 15
= 167 days
= 23 weeks + 6 days
= 6 odd days.
∴ Total number of odd days = 0 + 6 = 6 odd days.
Hence 15.06.1776 was Saturday.
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