The last day of a century cannot be either
I. Tuesday II. Thursday
III. Saturday IV. Saunday

Options

A. Monday
B. Wednesday
C. Friday
D. Saturday

Answer

C

Explanation

100 years contains 5 odd days. So last day of `1^(st)` century is ‘Friday..
200 years contains `(5 * 2))`=10 = 3 odd days. So last day of second century is .Wednesday.. 300 years contain 15 odd days = 1 odd day.
`therefore` Last day of 3rd century is ‘Monday.. 400 years contains 0 odd day.
`therefore` Last day of 4th century is .Sunday..
Since the order is continually kept in successive cycles, we see that the last day of a century cannot be Tuesday, Thursday or Saturday