Calendar Easy Trick To Solve (Reasoning)-ORSP

Number of days between given dates are= 18+28+31+30+31+30+31=199

Remainder after dividing 199 by 7 is 3 which means on 31^st july there will be the addition of 3 more days that is (Saturday +3) = Tuesday.

Hence, option A is the correct answer.

Thus, the day on 31^st December 1200 was Sunday so the day on 1^st January 1201 was Monday.

Hence, option A is the correct answer.

5 February 2008 = (2007 years + Period from 1.1.2008 to 5.2.2008)

Odd days in 1600 years = 0

Odd days in 400 years = 0

8 years = (6 ordinary years + 2 leap year) = (4 x 1 + 2 x 2) ≡ 8 odd days

Jan. Feb.

(31 + 5) = 36 days

36 days = (5 weeks + 1 day) ≡ 1 odd day.

Total number of odd days = (0 + 0 + 8 + 1) = 9 ≡ 2 odd day.

So, the day will be Tuesday.

Hence, option B is the correct answer.

We know the following:

Century Code:

1700s = 4

1800s = 2

1900s = 0

2000s = 6

2100s = 4

2200s = 2

2300s = 0

The Month Code:

January = 0

February = 3

March = 3

April = 6

May = 1

June = 4

July = 6

August = 2

September = 5

October = 0

November = 3

December = 5

Day Code:

0 = Sunday

1 = Monday

2 = Tuesday

3 = Wednesday

4 = Thursday

5 = Friday

6 = Saturday

Find Year Code of 2020:

Code =(YY + (YY division 4)) mod 7

=(20 + (20 division 4)) mod 7

=(20 + 5) mod 7

=25 mode 7

On dividing 25 by 7 we get remainder 4.

So, 4 is the year code of 2020.

“Mod” means to divide the number and keep only the remainder.

To find the day we have formula

=(Year Code + Month Code + Century Code + Date Number – Leap Year Code) mod 7

=(4 + 3 + 6 + 14 – 1) mod 7

=27 mode 7 =5 = Friday

So, day of the week of 14 February 2020 = friday

Hence, option C is the correct answer.