#
If Today is 20^{th} November 2017 which is a Monday. What day will be on 20^{th} November 2020?

**{Please find the answer in a mathematical order and manner. Please explain properly how to solve these questions which usually appears in olympiads}**

Please find below the solution to the asked query:

Given : If Today is 20

^{th}November 2017 which is a Monday.

So,

Number of days after 20

^{th}November 2017 in 2017 = 10 + 31 = 41

And we know 2018 and 2019 are not leap years , So

Number of days in 2018 = 365

And

Number of days in 2019 = 365

But 2020 is a leap year , So

Number of days till 20

^{th}November 2020 in 2020 = 31 + 29 + 31 + 30 + 31 + 30 + 31 +31 + 30 + 31 + 20 = 325

Then,

Total days from 20

^{th}November 2017 to 20

^{th}November 2020 = 41 + 365 + 365 + 325 = 1096

We know number of days in a week = 7 and each day will repeat after a week , So

$\frac{1096}{7}=\mathbf{156}\frac{\mathbf{4}}{\mathbf{7}}$ , Here we get odd days = 4

As 20

^{th}November 2017 is a Monday. , So

1 odd days = Tuesday ,

2 odd days = Wednusday ,

3 odd days = Thursday ,

4 odd days = Friday

Therefore,

**On 20**

^{th}November 2020 we have Friday . ( Ans )Hope this information will clear your doubts about topic.

If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

Regards

**
**