A) Monday
B) Tuesday
C) Wednesday
D) Friday
Correct Answer: C
Solution :
1600 years contain 0 odd day, 300 years contain 1 odd day. Also, 83 years contain 20 leap years and 63 ordinary years and therefore (40 + 0) odd days i.e., 5 odd days. \[\therefore \] 1983 years contain (0 + 1 +5) i.e., 6 odd days. Number of days from Jan. 1984 to 31st Oct. 1984 = (31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31) = 305 days = 4 odd days \[\therefore \] Total number of odd days = 6 + 4 = 3 odd days So, 31st Oct. 1984 was Wednesday
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