SOLUTION: After a period of particularly bad weather,the parliament of franistan decreed that there would no longer be any weather on even numbered calendar dates.During one of the months fo

Question 524249: After a period of particularly bad weather,the parliament of franistan decreed that there would no longer be any weather on even numbered calendar dates.During one of the months following that decree, three Mondays had no weather! on what
day of the week did the 13th of that month occur ?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
If the 1st monday of the month ends up
on the 6th, which is even, the days go
W T F S S M
The next monday is on the 6th + 7 = 13th
The next monday is on the 13th + 7 = 20th
The next monday is on the 20th + 7 = 27th
That uses up all the mondays, but there is
only 2 that fall on even days
-----------------------------------------
If the 1st monday of the month ends up
on the 4th, which is even, the days go
F S S M
The next monday is on the 4th + 7 = 11th
The next monday is on the 11th + 7 = 18th
The next monday is on the 18th + 7 = 25th
That uses up all the mondays, but there is
only 2 that fall on even days
-----------------------------------------
If the 1st monday of the month ends up
on the 2nd, which is even, the days go
S M
The next monday is on the 2nd + 7 = 9th
The next monday is on the 9th + 7 = 16th
The next monday is on the 16th + 7 = 23rd
The next monday is on the 23rd + 7 = 30th
That is 3 mondays that fall on even days
------------------------------------------
The 15th would be sunday
The 14th would be saturday
The 13th would be friday

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