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If 18th October 2011 was a Sunday, then what day of the week was it on 19th September 2012?
According to the question, 18th October 2011 is Sunday
Number of days left in October = $$31-18=13$$
Similarly, odd days from 18th October 2011 till 19th September 2012
= $$(13+30+31+31+29+31+30+31+30+31+31+19)\%7$$ (February has 29 days in a leap year)
Now, dividing 36 by 7, remainder = 1
Thus, day on 19th September 2012 = Sunday (+1) = Monday
=> Ans - (D)
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