Question

If 7th April 2009 is Wednesday, then 7th April 2609
will be a​

Answer 1

Tuesday

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Answer 2

Answer:

7th April 2609 is Wednesday.

Step-by-step explanation:

Informations to be remembered.

Magic Number Month array.

For Year: {0,3,3,6,1,4,6,2,5,0,3,5}

DAY array starting from 0-6: {Sunday, Monday, Tuesday, Wednesday,

Thursday, Friday, Saturday} where 0 represents Sunday, 1 represents Monday and so on.

Century Year Value: 1600-1699 = 6

     1700-1799 = 4

     1800-1899 = 2

     1900-1999 = 0

     2000-2099 = 6

Concept used :

Now, Consider the last 2 digits of the number: 09

Divide the above value by 4: 2

The remainder is 1.

Take the date: 7

Take month value from the array : 6

Take century year value: 6

Take the sum of all the numbers, we get : 31

Divide the sum by 7 and get the remainder: 3

From the array 3 represents Wednesday, Thus the 7th April 2609 is Wednesday.

To know more about the concept, refer:

https://www.geeksforgeeks.org/find-day-of-the-week-for-a-given-date/

https://www.wikihow.com/Calculate-the-Day-of-the-Week

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