Aptitude - Calendar - Discussion

Discussion Forum : Calendar - General Questions (Q.No. 4)
4.
What will be the day of the week 15th August, 2010?
Sunday
Monday
Tuesday
Friday
Answer: Option
Explanation:

15th August, 2010 = (2009 years + Period 1.1.2010 to 15.8.2010)

Odd days in 1600 years = 0

Odd days in 400 years = 0

9 years = (2 leap years + 7 ordinary years) = (2 x 2 + 7 x 1) = 11 odd days 4 odd days.

Jan.  Feb.   March    April    May  June  July  Aug. 
(31 +  28  +  31   +   30   +  31  + 30  + 31  + 15) = 227 days

227 days = (32 weeks + 3 days) 3 odd days.

Total number of odd days = (0 + 0 + 4 + 3) = 7 0 odd days.

Given day is Sunday.

Discussion:
95 comments Page 4 of 10.

Habib said:   5 years ago
@John. 2000 is splint into a possible and nearest 4th century to the figure and after a remainder is obtained.

i.e 2000 = 1600 + 400.

Thinlay Penjor said:   7 years ago
Hello.

Why we are taking the odd number of 1600 years, 400 years and 9 years when it is only asked any the day on 15th August 2010?

Murugan.s said:   9 years ago
We are getting finally 7 (the first day 0 the week is Sunday) so how could we took 7 is Sunday, could you please sort out the same?

Sunita said:   1 decade ago
I am not able to understand that how you calculate ordinary and leap years in 100 years, 97 years.

Is there any formula for that?

Rupali said:   1 decade ago
Please can you tell me how you write the.

Total number of odd days = (0 + 0 + 4 + 3) = 7 odd days.

I can't understand this step.

Arshad said:   1 decade ago
How to find odd years in 100 years, 80 years or so.... Is their any formula to find it rather to go year by year calculation.

Gopakumar said:   1 decade ago
Is anyone have the simplest way to give answer to this question? How can we understand the year said is leap year?

Vishnu said:   1 decade ago
9 years = (2 leap years + 7 ordinary years) = (2 x 2 + 7 x 1) = 11 odd days 4 odd days.

How com tat 4 odd days ?

Hary said:   1 decade ago
Sumit,

11 days are left and in those 11 days,week days (7) are subtracted so the remaining are 11-7=4 odd days.

Rupali said:   1 decade ago
Why you are taken one time 1600, 400 or 1600, 300 in sum it's not possible to me to understand please help me?


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