There are exactly 4 thursday and 4 sunday in a month of 31. find the first day of the month
Answers
As every month have minimum 4 of each type of days
so, 7×4=28
other 3 days left which can be
MONDAY, TUESDAY AND WEDNESDAY otherwise monday and thursday will be repeated....
For your verification you can watch calender of october 2018
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Answer:
The first day of the month is Monday.
Step-by-step explanation:
Given:
Month has exactly 4 Thursday and 4 Sundays.
Number of days in the month = 31
To find: First day of the month.
We know that there are exactly 4 weeks in a month of 30 days.
We also knows that there are 7 days in a week.
Number of days in 4 week = 4 × 7 = 28 days
So, we left with 31 - 28 = 3 days.
If month starts with Monday then after 4 week we have Monday , Tuesday , Wednesday for last 3 days which also has exact 4 Thursday and 4 Sundays.
If month starts with Tuesday then after 4 week we have Tuesday , Wednesday , Thursday for last 3 days which has 5 Thursday and exact 4 Sunday.
Similarly for any other day we don't have exactly 4 Thursday and 4 Sundays.
Therefore, The first day of the month is Monday.