1.

January 1, 2008 is Tuesday. What day of the week lies on January 1, 2009?

A.) Monday
B.) Wednesday
C.) Thursday
D.) Sunday

The year 2008 is a leap year. So it has 2 odd days.
1st day of the year 2008 is Tuesday (given)
So, 1st day of the year 2009 is 2 days beyond Tuesday. So it has to be Thursday.

2.

What was the day of the week on 7th October, 2003?

A.) Sunday
B.) Saturday
C.) Friday
D.) Wednesday

Formula = ( Date + Monthcode + No.of years + No.of leapyears + Century code )/ 7
==> (7 + 1 + 3 + 0 + 6)/7 = 17/7 = 3
==> Tuesday

3.

What was the day of the week on 17th June, 1998

A.) Tuesday
B.) Monday
C.) Sunday
D.) 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 has 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 = 24 weeks = 0 odd day
Total number of odd days = (0 + 1 + 2 + 0) = 3
Given day is Wednesday

4.

Which of the following is not a leap year?

A.) 700
B.) 800
C.) 1200
D.) 2000

The century divisible by 400 is a leap year.
The tear 700 is not a leap year

5.

It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?

A.) Monday
B.) Friday
C.) Thursday
D.) Saturday