Q. What was the day of the week on 17June, 1998?
(A) Wednesday
(B) Monday
(C) Tuesday
(D) Thursday
Answer: A [Wednesday]
17th June, 1998 = (1997 years + Period from 1.1.1998 to 17.6.1998)
Odd days in 1600 years = 0
Odd days in 300 years = (5 × 3) ≡ 1
97 years have 24 leap years + 73 ordinary years.
Number of odd days in 97 years (24 × 2 + 73) = 121 = 2 odd days.
Jan. Feb. March April May June
(31 + 28 + 31 + 30 + 31 + 17) = 168 days
∴ 168 days = 24 weeks = 0 odd day.
Total number of odd days = (0 + 1 + 2 + 0) = 3.
Given day is Wednesday.