Calendar - General Aptitude

Q1:

The last day of a century cannot be

A Monday

B Wednesday

C Tuesday

D Friday

ANS:C - Tuesday

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