#25. if instead of 365 days, a year was of 400 days and a leap year was of 450 days, then what will be the day on 1st day of year 2031 if 1st day of year 2021 is a thursday given that a week still has 7days.
Answers
Answer:
SUNDAY
1 year = 400 days
leap year= 450 days
no:of days between the 2 given dates =
(400×10) + 100 = 500.
No: of weeks = 500/7 = 71 with 3 remainder.
Let 0=Sunday ...... 6= Friday.
Thursday= 4
4+3 (mod 7)
= 0
ANS: 0 = SUNDAY
mod
Answer:
The day on 1st day of the year 2031 is Tuesday
Step-by-step explanation:
Given data
instead of 365 days, a year has 400 days
and leap year has 450 days
1st day of year 2021 is Thursday
Here we need to find the day on 1st day of year 2031
⇒ lets find out number of days between 2 dates
⇒ there are ten years between 2021 to 2031
10 years = 8 year +2 leap year [for every 4 years there is a one leap year]
number of days between 2 days = [8× 400]+ [2×450] = 3200 +900 =4100
⇒ number of days between 2 dates = 4100 days
⇒ number of weeks in 4100 days = 4100/ 7 = 585 weeks+ 5 days
⇒ 585 weeks ends with Thursday
⇒ now add 5 days to Thursday = Thursday + 5 days = Tuesdays
⇒ The day on 1st day of the year 2031 is Tuesday