Question 859359: Mrs. Williams noticed that her in-laws' birth dates have an unusual property. Her mother-in-law was born 5-31-36, and her farther-in-law was born 9-25-34. Furthermore, her husband's grandfather was born 7-7-14. How many birth dates in a century have this property, in which the sum of the month and the day equal the value of the last two-digits of the birth year?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! Mrs. Williams noticed that her in-laws' birth dates have an unusual property.
Her mother-in-law was born 5-31-36, and her farther-in-law was born 9-25-34.
Furthermore, her husband's grandfather was born 7-7-14.
How many birth dates in a century have this property, in which the sum of the month and the day equal the value of the last two-digits of the birth year?
:
We know that all of them would occur between 02 and 43 yrs,
01-01-02 and 12-31-43
:
Anyway
12*31 = 372
Apr, Jun, Sep, Nov only 30 days subtract 4; 368
A normal Feb, subtract 3: 365 days,
the number or days in a year, that's interesting
|
|
|
