• 1.
• Day Codes:-
Sat = 0
Sun = 1
Mon = 2
Tue = 3
Wed = 4
Thu = 5
Fri = 6
Month Codes:-
Jan = 1
Feb = 4
Mar = 4
Apr = 0
May = 2
Jun = 5
Jul = 0
Aug = 3
Sep = 6
Oct = 1
Nov = 4
Dec = 6
Century Codes:-
1500 - 1599 ---> 0
1600 - 1699 ---> 6
1700 - 1799 ---> 4
1800 - 1899 ---> 2
1900 - 1999 ---> 0
2000 - 2099 ---> 6
2100 - 2199 ---> 4
2200 - 2299 ---> 2
2300 - 2399 ---> 0

What was the day of the week on 24th July 2011?
A.) Monday
B.) Sunday
C.) Friday
D.) None of these

Formula:-(Date + Month code + No.of years + No.of leap year + Century code)/7
= (24 + 0 + 11 + 2 + 6)/7 = 43/7 = 1
= Sunday

• 2. What was day of the week on 21-September-1987?
A.) Sunday
B.) Monday
C.) Friday
D.) Saturday

Formula:-(Date + Month code + No.of years + No.of leap year + Century code)/7
= (21 + 6 + 87 + 21 + 0)/7 = 135/7 = 2
= Monday

• 3. What was the day of the week on 26-January-1950?
A.) Sunday
B.) Monday
C.) Wednesday
D.) Thursday

Formula:-(Date + Month code + No.of years + No.of leap year + Century code)/7
= (26 + 1 + 50 + 12 + 0)/7 = 84/7 = 5
= Thursday

• 4. Today is Monday, after 61 days, the day will be:
A.) Wednesday
B.) Saturday
C.) Tuesday
D.) Thursday

Each day of the week is repeated after 7 days.
So, after 63 days, it will be Monday.
After 61 days, it will be saturday.

• 5. 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

• 6. Today is Friday, after 126 days, it will be:
A.) Sunday
B.) Tuesday
C.) Friday
D.) Monday

126/7 = 0
Each day of the week is repeated after 7 days.
So, after 126 days, it will be Friday.
After 126 days, it will be Friday.

• 7. How many days are there in x weeks X days?
A.) 7x²
B.) 8x
C.) 14x
D.) 7

x weeks x days = (7x + x) days = 8x days

• 8. It was Sunday on January-1-2006. Find the day of the week on January-1-2010?
A.) Sunday
B.) Saturday
C.) Friday
D.) Wednesday

On 31st December, 2005 it was Saturday.
Number of odd days from the year 200 to the tear 2009 = ( 1 + 1 + 2 + 1 ) = 5days
On 31st December 2009, it was Thursday.
Thus, on 1st Jan, 2010 it is Friday.

• 9. 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

• 10. On 2007, What was the date of last Saturday in May month?
A.) 21
B.) 22
C.) 25
D.) 26

1 - May - 2007
=(1 + 2 + 7 + 1 + 6)/7 = 17/7 = 3 = Tuesday
= May 1st --> Tuesday + 5 days = Saturday = 5th may
5th may + 7 days = Saturday = 12th may
12th may + 7 days = Saturday = 19th may
19th may + 7 days = Saturday = 26th may

• 11. What was the day of the week on 10th March 1996?
A.) Sunday
B.) Tuesday
C.) Saturday
D.) Wednesday

(10 + 4 + 96 + 24 + 0)/7 = 134/7 = 1
= Sunday

• 12. On 8th February 2005, it was Tuesday. What was the day of the week on 8 February 2004?
A.) Tuesday
B.) Monday
C.) Sunday
D.) Wednesday

The year 2004 is a leap year. It has 2 odd days.
The day on 8th Feb, 2004 is 2 days before the day on 8th Feb, 2005
Hence, this day is Sunday.

• 13. 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

• 14. It was Thursday on 2nd Jan 1993. What day of the week will be on 15th March 1993?
A.) Monday
B.) Wednesday
C.) Saturday
D.) Friday

Today number of days = 29(Jan) + 28 (Feb) + (15) Mar = 72 days 10 Weeks + 2 days.
Thus the given date will fall on two days beyond Thursday, that is Saturday.

• 15. 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.

• 16. On what dates on April 2001 did Wednesday fall?
A.) 1st , 8th, 15th, 22nd , 29th
B.) 2nd , 9th , 16th , 23rd , 30th
C.) 4th , 11th , 18th , 25th
D.) 3rd , 10th , 17th , 24th

We shall find the day on 1st April 2001 1st April 2001 = 2000 years + Period from 1.1.2001 to 1.4.2001 Odd days in 1600 years = 0 Odd days in 400 years = 0 Jan, Feb, Mar, April = 31 + 28 + 31 + 1 = 91 days = 0 odd days On 1st April it is Sunday.
In April, 2001 Wednesday falls on 4th , 11th , 18th and 25th .

• 17. 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