Mathematical Aptitude MCQ - Calendar Questions

1st April, 2001 = (2000 years + period from 1.1.2001 to 1.4.2001)
Odd days in 2000 years = 0
Now, calculate the odd days for the year 2001.91 divided by 7 gives 0 as remainder, so, odd days can be counted as 0.
Total number of odd days = (0 + 0) = 0
On 1st April, 2001, it was Sunday.

100 years contain 5 odd days.
Last day of 1st century is Friday.
200 years contain (5 × 2) = 3 odd days
Last day of 2nd century is Wednesday.
300 years contain (5 × 3) = 15 odd days that is, equal to 1 odd day.
Last day of 3rd century is Monday.
400 years contain 0 odd days.
Last day of 4th century is Sunday.
This cycle is repeated.
Last day of a century cannot be Tuesday or Thursday or Saturday.