Counting of a day
Number Theory
Level
2
What is the day on the week on "27th dec 1986"
saturday
monday
friday
wednesday
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1 solution
Today 19/7/2014 Saturday count days back till 27/12/2013 = 204 days
204/7 remainder is 6 count 6 days back of Saturday it is Friday on 27/12/2013
count years from 1986 to 2013 = 27 years in that there are 7 leap years so Day on 27/12/1986 is (27 + 7)/7 remainder is 6
Day is 6 days back of Friday and it is Saturday