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 \[\left( 40+0 \right)\]odd days i.e., 5 odd days. 1983 years contain \[\left( 0+1+5 \right)\]i.e., 6 odd days. Number of days from Jan. 1984 to 31 st Oct. 1984 \[=\left( 31+29+31+30+31+30+31+31+30+31 \right)\] =305 days = 4 odd days \[\therefore \] Total number of odd days \[=6+4=3\]odd days So, 31 st Oct. 1984 was Wednesday
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